/usr/bin/java -Xmx16000000000 -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-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 04:01:26,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 04:01:26,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 04:01:27,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 04:01:27,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 04:01:27,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 04:01:27,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 04:01:27,106 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-FA-NoLbe.epf [2022-01-18 04:01:27,138 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 04:01:27,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 04:01:27,138 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 04:01:27,139 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 04:01:27,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 04:01:27,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 04:01:27,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 04:01:27,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 04:01:27,140 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 04:01:27,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 04:01:27,141 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 04:01:27,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 04:01:27,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 04:01:27,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 04:01:27,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 04:01:27,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 04:01:27,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 04:01:27,142 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 04:01:27,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 04:01:27,142 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 04:01:27,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 04:01:27,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 04:01:27,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 04:01:27,143 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 04:01:27,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 04:01:27,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 04:01:27,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 04:01:27,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 04:01:27,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 04:01:27,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 04:01:27,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 04:01:27,144 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 04:01:27,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 04:01:27,144 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 04:01:27,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 04:01:27,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 04:01:27,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 04:01:27,372 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 04:01:27,376 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 04:01:27,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl [2022-01-18 04:01:27,377 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl' [2022-01-18 04:01:27,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 04:01:27,411 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 04:01:27,413 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 04:01:27,413 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 04:01:27,413 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 04:01:27,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:01:27" (1/1) ... [2022-01-18 04:01:27,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:01:27" (1/1) ... [2022-01-18 04:01:27,440 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 04:01:27,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 04:01:27,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 04:01:27,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 04:01:27,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 04:01:27,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:01:27" (1/1) ... [2022-01-18 04:01:27,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:01:27" (1/1) ... [2022-01-18 04:01:27,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:01:27" (1/1) ... [2022-01-18 04:01:27,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:01:27" (1/1) ... [2022-01-18 04:01:27,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:01:27" (1/1) ... [2022-01-18 04:01:27,470 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:01:27" (1/1) ... [2022-01-18 04:01:27,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:01:27" (1/1) ... [2022-01-18 04:01:27,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 04:01:27,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 04:01:27,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 04:01:27,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 04:01:27,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:01:27" (1/1) ... [2022-01-18 04:01:27,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 04:01:27,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:27,509 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) [2022-01-18 04:01:27,520 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 [2022-01-18 04:01:27,547 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 04:01:27,547 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 04:01:27,547 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 04:01:27,548 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 04:01:27,548 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 04:01:27,548 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 04:01:27,548 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 04:01:27,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 04:01:27,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 04:01:27,548 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 04:01:27,548 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 04:01:27,548 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 04:01:27,549 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 04:01:27,597 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 04:01:27,598 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 04:01:27,740 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 04:01:27,746 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 04:01:27,746 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 04:01:27,747 INFO L202 PluginConnector]: Adding new model array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:01:27 BoogieIcfgContainer [2022-01-18 04:01:27,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 04:01:27,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 04:01:27,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 04:01:27,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 04:01:27,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:01:27" (1/2) ... [2022-01-18 04:01:27,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a14969b and model type array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 04:01:27, skipping insertion in model container [2022-01-18 04:01:27,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:01:27" (2/2) ... [2022-01-18 04:01:27,776 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.bpl [2022-01-18 04:01:27,780 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 04:01:27,781 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 04:01:27,781 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 04:01:27,781 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 04:01:27,810 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 04:01:27,842 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 04:01:27,848 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, 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 [2022-01-18 04:01:27,848 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 04:01:27,855 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 35 transitions, 94 flow [2022-01-18 04:01:27,925 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 305 states, 304 states have (on average 3.3782894736842106) internal successors, (1027), 304 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:27,929 INFO L276 IsEmpty]: Start isEmpty. Operand has 305 states, 304 states have (on average 3.3782894736842106) internal successors, (1027), 304 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:27,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:01:27,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:27,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:27,947 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:27,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:27,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1477602056, now seen corresponding path program 1 times [2022-01-18 04:01:27,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:27,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044244809] [2022-01-18 04:01:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:27,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:28,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:28,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:28,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044244809] [2022-01-18 04:01:28,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044244809] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:01:28,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:01:28,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 04:01:28,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423978763] [2022-01-18 04:01:28,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:01:28,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 04:01:28,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:28,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 04:01:28,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 04:01:28,222 INFO L87 Difference]: Start difference. First operand has 305 states, 304 states have (on average 3.3782894736842106) internal successors, (1027), 304 states have internal predecessors, (1027), 0 states have call successors, (0), 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 3.75) internal successors, (15), 3 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) [2022-01-18 04:01:28,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:28,500 INFO L93 Difference]: Finished difference Result 606 states and 2050 transitions. [2022-01-18 04:01:28,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 04:01:28,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 15 [2022-01-18 04:01:28,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:28,537 INFO L225 Difference]: With dead ends: 606 [2022-01-18 04:01:28,537 INFO L226 Difference]: Without dead ends: 591 [2022-01-18 04:01:28,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 04:01:28,542 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:28,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 26 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:01:28,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-01-18 04:01:28,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 406. [2022-01-18 04:01:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.3580246913580245) internal successors, (1360), 405 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:28,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1360 transitions. [2022-01-18 04:01:28,635 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1360 transitions. Word has length 15 [2022-01-18 04:01:28,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:28,635 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1360 transitions. [2022-01-18 04:01:28,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2022-01-18 04:01:28,635 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1360 transitions. [2022-01-18 04:01:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:01:28,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:28,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:28,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 04:01:28,640 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:28,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:28,641 INFO L85 PathProgramCache]: Analyzing trace with hash 314777040, now seen corresponding path program 1 times [2022-01-18 04:01:28,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:28,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640329983] [2022-01-18 04:01:28,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:28,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:28,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:28,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640329983] [2022-01-18 04:01:28,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640329983] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:28,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073425264] [2022-01-18 04:01:28,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:28,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:28,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:28,776 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) [2022-01-18 04:01:28,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 04:01:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:28,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 04:01:28,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:29,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:29,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-18 04:01:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:29,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073425264] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:29,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:29,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-01-18 04:01:29,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175635861] [2022-01-18 04:01:29,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:29,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 04:01:29,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:29,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 04:01:29,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-18 04:01:29,233 INFO L87 Difference]: Start difference. First operand 406 states and 1360 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2022-01-18 04:01:29,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:29,452 INFO L93 Difference]: Finished difference Result 1387 states and 4491 transitions. [2022-01-18 04:01:29,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 04:01:29,452 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 18 [2022-01-18 04:01:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:29,464 INFO L225 Difference]: With dead ends: 1387 [2022-01-18 04:01:29,464 INFO L226 Difference]: Without dead ends: 1130 [2022-01-18 04:01:29,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-18 04:01:29,470 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 159 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 137 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 [2022-01-18 04:01:29,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 137 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:01:29,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-01-18 04:01:29,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 440. [2022-01-18 04:01:29,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.359908883826879) internal successors, (1475), 439 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:29,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1475 transitions. [2022-01-18 04:01:29,534 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1475 transitions. Word has length 18 [2022-01-18 04:01:29,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:29,535 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1475 transitions. [2022-01-18 04:01:29,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2022-01-18 04:01:29,535 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1475 transitions. [2022-01-18 04:01:29,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:01:29,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:29,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:29,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:29,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:29,756 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:29,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:29,757 INFO L85 PathProgramCache]: Analyzing trace with hash 777242579, now seen corresponding path program 1 times [2022-01-18 04:01:29,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:29,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497301212] [2022-01-18 04:01:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:29,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:29,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:29,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497301212] [2022-01-18 04:01:29,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497301212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:29,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842056012] [2022-01-18 04:01:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:29,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:29,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:29,977 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) [2022-01-18 04:01:29,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 04:01:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:30,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 04:01:30,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:30,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:30,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:30,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 04:01:30,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:30,430 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 23 treesize of output 27 [2022-01-18 04:01:30,438 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:30,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 04:01:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:30,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842056012] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:30,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:30,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2022-01-18 04:01:30,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575656907] [2022-01-18 04:01:30,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:30,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 04:01:30,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:30,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 04:01:30,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-18 04:01:30,550 INFO L87 Difference]: Start difference. First operand 440 states and 1475 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:30,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:30,932 INFO L93 Difference]: Finished difference Result 1656 states and 5504 transitions. [2022-01-18 04:01:30,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:01:30,933 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2022-01-18 04:01:30,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:30,942 INFO L225 Difference]: With dead ends: 1656 [2022-01-18 04:01:30,942 INFO L226 Difference]: Without dead ends: 1415 [2022-01-18 04:01:30,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:01:30,945 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 285 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:30,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 84 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:01:30,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-01-18 04:01:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 637. [2022-01-18 04:01:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.49685534591195) internal successors, (2224), 636 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2224 transitions. [2022-01-18 04:01:30,982 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2224 transitions. Word has length 18 [2022-01-18 04:01:30,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:30,983 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 2224 transitions. [2022-01-18 04:01:30,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2224 transitions. [2022-01-18 04:01:30,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:01:30,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:30,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:31,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:31,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-18 04:01:31,208 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:31,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:31,208 INFO L85 PathProgramCache]: Analyzing trace with hash 384589864, now seen corresponding path program 1 times [2022-01-18 04:01:31,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:31,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549593238] [2022-01-18 04:01:31,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:31,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:31,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:31,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549593238] [2022-01-18 04:01:31,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549593238] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:01:31,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:01:31,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 04:01:31,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030809259] [2022-01-18 04:01:31,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:01:31,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 04:01:31,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:31,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 04:01:31,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 04:01:31,278 INFO L87 Difference]: Start difference. First operand 637 states and 2224 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:31,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:31,385 INFO L93 Difference]: Finished difference Result 1165 states and 3991 transitions. [2022-01-18 04:01:31,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 04:01:31,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2022-01-18 04:01:31,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:31,391 INFO L225 Difference]: With dead ends: 1165 [2022-01-18 04:01:31,391 INFO L226 Difference]: Without dead ends: 922 [2022-01-18 04:01:31,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 04:01:31,392 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 71 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:31,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 63 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:01:31,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-01-18 04:01:31,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 692. [2022-01-18 04:01:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.4905933429811866) internal successors, (2412), 691 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:31,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2412 transitions. [2022-01-18 04:01:31,417 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2412 transitions. Word has length 18 [2022-01-18 04:01:31,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:31,417 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 2412 transitions. [2022-01-18 04:01:31,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:31,418 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2412 transitions. [2022-01-18 04:01:31,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:01:31,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:31,420 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:31,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 04:01:31,420 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:31,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:31,421 INFO L85 PathProgramCache]: Analyzing trace with hash -670667898, now seen corresponding path program 2 times [2022-01-18 04:01:31,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:31,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594905612] [2022-01-18 04:01:31,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:31,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:31,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:31,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594905612] [2022-01-18 04:01:31,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594905612] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:01:31,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:01:31,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 04:01:31,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209163215] [2022-01-18 04:01:31,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:01:31,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 04:01:31,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:31,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 04:01:31,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 04:01:31,506 INFO L87 Difference]: Start difference. First operand 692 states and 2412 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:31,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:31,613 INFO L93 Difference]: Finished difference Result 1341 states and 4473 transitions. [2022-01-18 04:01:31,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 04:01:31,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2022-01-18 04:01:31,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:31,627 INFO L225 Difference]: With dead ends: 1341 [2022-01-18 04:01:31,628 INFO L226 Difference]: Without dead ends: 1080 [2022-01-18 04:01:31,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 04:01:31,630 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 77 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:31,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 68 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:01:31,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-01-18 04:01:31,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 710. [2022-01-18 04:01:31,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 3.459802538787024) internal successors, (2453), 709 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:31,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2453 transitions. [2022-01-18 04:01:31,659 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2453 transitions. Word has length 18 [2022-01-18 04:01:31,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:31,660 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 2453 transitions. [2022-01-18 04:01:31,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:31,660 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2453 transitions. [2022-01-18 04:01:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:01:31,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:31,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:31,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 04:01:31,663 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:31,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:31,663 INFO L85 PathProgramCache]: Analyzing trace with hash 141777002, now seen corresponding path program 2 times [2022-01-18 04:01:31,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:31,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809807997] [2022-01-18 04:01:31,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:31,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:31,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:31,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809807997] [2022-01-18 04:01:31,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809807997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:31,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691268890] [2022-01-18 04:01:31,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:01:31,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:31,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:31,751 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) [2022-01-18 04:01:31,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 04:01:31,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:01:31,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:01:31,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:01:31,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:31,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:31,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-18 04:01:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:32,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691268890] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:32,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:32,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2022-01-18 04:01:32,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477617702] [2022-01-18 04:01:32,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:32,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 04:01:32,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:32,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 04:01:32,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 04:01:32,089 INFO L87 Difference]: Start difference. First operand 710 states and 2453 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:32,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:32,518 INFO L93 Difference]: Finished difference Result 2749 states and 9004 transitions. [2022-01-18 04:01:32,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 04:01:32,519 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2022-01-18 04:01:32,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:32,534 INFO L225 Difference]: With dead ends: 2749 [2022-01-18 04:01:32,534 INFO L226 Difference]: Without dead ends: 2192 [2022-01-18 04:01:32,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:01:32,535 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 380 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:32,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 281 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:01:32,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2022-01-18 04:01:32,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1040. [2022-01-18 04:01:32,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 3.623676612127045) internal successors, (3765), 1039 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:32,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3765 transitions. [2022-01-18 04:01:32,595 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3765 transitions. Word has length 18 [2022-01-18 04:01:32,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:32,596 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 3765 transitions. [2022-01-18 04:01:32,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:32,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3765 transitions. [2022-01-18 04:01:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 04:01:32,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:32,599 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:32,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:32,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:32,820 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:32,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:32,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1785499653, now seen corresponding path program 1 times [2022-01-18 04:01:32,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:32,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36353582] [2022-01-18 04:01:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:32,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:32,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:32,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36353582] [2022-01-18 04:01:32,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36353582] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:32,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613991267] [2022-01-18 04:01:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:32,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:32,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:32,902 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) [2022-01-18 04:01:32,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 04:01:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:32,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 04:01:32,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:33,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:01:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:33,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:33,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:33,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:01:33,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:33,251 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 20 treesize of output 24 [2022-01-18 04:01:33,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:33,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 04:01:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:33,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613991267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:33,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:33,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-01-18 04:01:33,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342761632] [2022-01-18 04:01:33,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:33,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:01:33,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:33,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:01:33,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:01:33,297 INFO L87 Difference]: Start difference. First operand 1040 states and 3765 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:33,727 INFO L93 Difference]: Finished difference Result 3114 states and 10907 transitions. [2022-01-18 04:01:33,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:01:33,727 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 04:01:33,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:33,748 INFO L225 Difference]: With dead ends: 3114 [2022-01-18 04:01:33,748 INFO L226 Difference]: Without dead ends: 2931 [2022-01-18 04:01:33,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:01:33,750 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 226 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:33,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 258 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:01:33,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2022-01-18 04:01:33,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 1769. [2022-01-18 04:01:33,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1768 states have (on average 3.690610859728507) internal successors, (6525), 1768 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:33,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 6525 transitions. [2022-01-18 04:01:33,824 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 6525 transitions. Word has length 21 [2022-01-18 04:01:33,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:33,824 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 6525 transitions. [2022-01-18 04:01:33,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:33,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 6525 transitions. [2022-01-18 04:01:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 04:01:33,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:33,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:33,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:34,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:34,051 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:34,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:34,052 INFO L85 PathProgramCache]: Analyzing trace with hash 145242945, now seen corresponding path program 1 times [2022-01-18 04:01:34,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:34,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456904301] [2022-01-18 04:01:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:34,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:34,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:34,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456904301] [2022-01-18 04:01:34,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456904301] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:34,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730415094] [2022-01-18 04:01:34,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:34,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:34,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:34,113 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) [2022-01-18 04:01:34,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 04:01:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:34,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 04:01:34,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:34,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:34,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:34,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 04:01:34,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:34,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 04:01:34,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:34,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 04:01:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:34,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730415094] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:34,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:34,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-01-18 04:01:34,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445663303] [2022-01-18 04:01:34,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:34,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:01:34,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:34,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:01:34,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:01:34,704 INFO L87 Difference]: Start difference. First operand 1769 states and 6525 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:35,752 INFO L93 Difference]: Finished difference Result 5233 states and 17883 transitions. [2022-01-18 04:01:35,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 04:01:35,753 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 04:01:35,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:35,782 INFO L225 Difference]: With dead ends: 5233 [2022-01-18 04:01:35,782 INFO L226 Difference]: Without dead ends: 4899 [2022-01-18 04:01:35,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 04:01:35,783 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 692 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:35,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 220 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:01:35,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2022-01-18 04:01:35,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 2499. [2022-01-18 04:01:35,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 3.6937550040032026) internal successors, (9227), 2498 states have internal predecessors, (9227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 9227 transitions. [2022-01-18 04:01:35,895 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 9227 transitions. Word has length 21 [2022-01-18 04:01:35,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:35,895 INFO L470 AbstractCegarLoop]: Abstraction has 2499 states and 9227 transitions. [2022-01-18 04:01:35,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:35,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 9227 transitions. [2022-01-18 04:01:35,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 04:01:35,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:35,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:35,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:36,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:36,112 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:36,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:36,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2088581083, now seen corresponding path program 2 times [2022-01-18 04:01:36,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:36,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828083922] [2022-01-18 04:01:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:36,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:36,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:36,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828083922] [2022-01-18 04:01:36,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828083922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:36,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273369938] [2022-01-18 04:01:36,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:01:36,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:36,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:36,229 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) [2022-01-18 04:01:36,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 04:01:36,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:01:36,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:01:36,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 04:01:36,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:36,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 04:01:36,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273369938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:01:36,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 04:01:36,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-01-18 04:01:36,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758065605] [2022-01-18 04:01:36,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:01:36,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 04:01:36,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:36,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 04:01:36,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 04:01:36,345 INFO L87 Difference]: Start difference. First operand 2499 states and 9227 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2022-01-18 04:01:36,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:36,512 INFO L93 Difference]: Finished difference Result 4412 states and 15908 transitions. [2022-01-18 04:01:36,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 04:01:36,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 21 [2022-01-18 04:01:36,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:36,530 INFO L225 Difference]: With dead ends: 4412 [2022-01-18 04:01:36,530 INFO L226 Difference]: Without dead ends: 4406 [2022-01-18 04:01:36,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:01:36,531 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 92 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:36,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 45 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:01:36,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4406 states. [2022-01-18 04:01:36,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4406 to 2607. [2022-01-18 04:01:36,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2607 states, 2606 states have (on average 3.7003069838833462) internal successors, (9643), 2606 states have internal predecessors, (9643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 9643 transitions. [2022-01-18 04:01:36,676 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 9643 transitions. Word has length 21 [2022-01-18 04:01:36,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:36,676 INFO L470 AbstractCegarLoop]: Abstraction has 2607 states and 9643 transitions. [2022-01-18 04:01:36,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2022-01-18 04:01:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 9643 transitions. [2022-01-18 04:01:36,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 04:01:36,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:36,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:36,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:36,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:36,904 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:36,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:36,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1175176701, now seen corresponding path program 3 times [2022-01-18 04:01:36,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:36,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370376653] [2022-01-18 04:01:36,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:36,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:36,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:36,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370376653] [2022-01-18 04:01:36,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370376653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:36,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195640528] [2022-01-18 04:01:36,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:01:36,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:36,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:36,988 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) [2022-01-18 04:01:36,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 04:01:37,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:01:37,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:01:37,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:01:37,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:37,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:37,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195640528] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:37,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:37,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 13 [2022-01-18 04:01:37,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141447898] [2022-01-18 04:01:37,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:37,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:01:37,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:37,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:01:37,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:01:37,368 INFO L87 Difference]: Start difference. First operand 2607 states and 9643 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:38,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:38,672 INFO L93 Difference]: Finished difference Result 8841 states and 29658 transitions. [2022-01-18 04:01:38,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 04:01:38,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 04:01:38,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:38,708 INFO L225 Difference]: With dead ends: 8841 [2022-01-18 04:01:38,708 INFO L226 Difference]: Without dead ends: 8268 [2022-01-18 04:01:38,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=395, Invalid=1411, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 04:01:38,709 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 485 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:38,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 404 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:01:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8268 states. [2022-01-18 04:01:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8268 to 2045. [2022-01-18 04:01:38,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 3.6183953033268104) internal successors, (7396), 2044 states have internal predecessors, (7396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:38,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7396 transitions. [2022-01-18 04:01:38,826 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7396 transitions. Word has length 21 [2022-01-18 04:01:38,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:38,826 INFO L470 AbstractCegarLoop]: Abstraction has 2045 states and 7396 transitions. [2022-01-18 04:01:38,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:38,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7396 transitions. [2022-01-18 04:01:38,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 04:01:38,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:38,833 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:38,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:39,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:39,056 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:39,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:39,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2130983577, now seen corresponding path program 2 times [2022-01-18 04:01:39,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:39,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242558912] [2022-01-18 04:01:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:39,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:39,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:39,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242558912] [2022-01-18 04:01:39,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242558912] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:01:39,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:01:39,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 04:01:39,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47015784] [2022-01-18 04:01:39,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:01:39,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 04:01:39,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:39,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 04:01:39,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 04:01:39,129 INFO L87 Difference]: Start difference. First operand 2045 states and 7396 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2022-01-18 04:01:39,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:39,215 INFO L93 Difference]: Finished difference Result 2479 states and 8813 transitions. [2022-01-18 04:01:39,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 04:01:39,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 21 [2022-01-18 04:01:39,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:39,224 INFO L225 Difference]: With dead ends: 2479 [2022-01-18 04:01:39,224 INFO L226 Difference]: Without dead ends: 2455 [2022-01-18 04:01:39,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 04:01:39,225 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:39,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 48 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:01:39,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2022-01-18 04:01:39,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2041. [2022-01-18 04:01:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.618137254901961) internal successors, (7381), 2040 states have internal predecessors, (7381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:39,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7381 transitions. [2022-01-18 04:01:39,316 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7381 transitions. Word has length 21 [2022-01-18 04:01:39,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:39,316 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 7381 transitions. [2022-01-18 04:01:39,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2022-01-18 04:01:39,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7381 transitions. [2022-01-18 04:01:39,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 04:01:39,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:39,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:39,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-18 04:01:39,325 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:39,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:39,326 INFO L85 PathProgramCache]: Analyzing trace with hash 998835253, now seen corresponding path program 3 times [2022-01-18 04:01:39,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:39,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508878302] [2022-01-18 04:01:39,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:39,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:39,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:39,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508878302] [2022-01-18 04:01:39,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508878302] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:01:39,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:01:39,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 04:01:39,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951527879] [2022-01-18 04:01:39,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:01:39,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 04:01:39,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:39,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 04:01:39,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 04:01:39,392 INFO L87 Difference]: Start difference. First operand 2041 states and 7381 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2022-01-18 04:01:39,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:39,501 INFO L93 Difference]: Finished difference Result 2469 states and 8793 transitions. [2022-01-18 04:01:39,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 04:01:39,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 21 [2022-01-18 04:01:39,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:39,514 INFO L225 Difference]: With dead ends: 2469 [2022-01-18 04:01:39,514 INFO L226 Difference]: Without dead ends: 2463 [2022-01-18 04:01:39,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 04:01:39,514 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:39,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 41 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:01:39,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2022-01-18 04:01:39,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 2067. [2022-01-18 04:01:39,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 3.6108422071636013) internal successors, (7460), 2066 states have internal predecessors, (7460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:39,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 7460 transitions. [2022-01-18 04:01:39,561 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 7460 transitions. Word has length 21 [2022-01-18 04:01:39,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:39,561 INFO L470 AbstractCegarLoop]: Abstraction has 2067 states and 7460 transitions. [2022-01-18 04:01:39,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2022-01-18 04:01:39,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 7460 transitions. [2022-01-18 04:01:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 04:01:39,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:39,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:39,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-18 04:01:39,566 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:39,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:39,567 INFO L85 PathProgramCache]: Analyzing trace with hash 239897023, now seen corresponding path program 4 times [2022-01-18 04:01:39,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:39,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948331287] [2022-01-18 04:01:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:39,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:39,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:39,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948331287] [2022-01-18 04:01:39,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948331287] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:01:39,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:01:39,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 04:01:39,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748077884] [2022-01-18 04:01:39,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:01:39,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 04:01:39,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:39,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 04:01:39,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 04:01:39,641 INFO L87 Difference]: Start difference. First operand 2067 states and 7460 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2022-01-18 04:01:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:39,729 INFO L93 Difference]: Finished difference Result 2427 states and 8660 transitions. [2022-01-18 04:01:39,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 04:01:39,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 21 [2022-01-18 04:01:39,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:39,737 INFO L225 Difference]: With dead ends: 2427 [2022-01-18 04:01:39,737 INFO L226 Difference]: Without dead ends: 2401 [2022-01-18 04:01:39,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 04:01:39,738 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:39,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 35 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:01:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2022-01-18 04:01:39,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 2041. [2022-01-18 04:01:39,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.6176470588235294) internal successors, (7380), 2040 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7380 transitions. [2022-01-18 04:01:39,785 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7380 transitions. Word has length 21 [2022-01-18 04:01:39,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:39,785 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 7380 transitions. [2022-01-18 04:01:39,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2022-01-18 04:01:39,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7380 transitions. [2022-01-18 04:01:39,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 04:01:39,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:39,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:39,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-18 04:01:39,791 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:39,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:39,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1796214363, now seen corresponding path program 1 times [2022-01-18 04:01:39,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:39,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904395437] [2022-01-18 04:01:39,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:39,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:01:39,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:39,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904395437] [2022-01-18 04:01:39,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904395437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:39,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786673589] [2022-01-18 04:01:39,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:39,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:39,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:39,876 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) [2022-01-18 04:01:39,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 04:01:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:39,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 04:01:39,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:01:40,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:40,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-18 04:01:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:01:40,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786673589] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:40,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:40,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-18 04:01:40,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861091848] [2022-01-18 04:01:40,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:40,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:01:40,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:40,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:01:40,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:01:40,362 INFO L87 Difference]: Start difference. First operand 2041 states and 7380 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:40,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:40,906 INFO L93 Difference]: Finished difference Result 4176 states and 14263 transitions. [2022-01-18 04:01:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 04:01:40,906 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 04:01:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:40,916 INFO L225 Difference]: With dead ends: 4176 [2022-01-18 04:01:40,916 INFO L226 Difference]: Without dead ends: 3709 [2022-01-18 04:01:40,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:01:40,917 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 357 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:40,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 495 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:01:40,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3709 states. [2022-01-18 04:01:40,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3709 to 2366. [2022-01-18 04:01:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 2365 states have (on average 3.691754756871036) internal successors, (8731), 2365 states have internal predecessors, (8731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 8731 transitions. [2022-01-18 04:01:41,006 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 8731 transitions. Word has length 24 [2022-01-18 04:01:41,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:41,006 INFO L470 AbstractCegarLoop]: Abstraction has 2366 states and 8731 transitions. [2022-01-18 04:01:41,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:41,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 8731 transitions. [2022-01-18 04:01:41,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 04:01:41,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:41,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:41,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:41,231 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,SelfDestructingSolverStorable13 [2022-01-18 04:01:41,232 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:41,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:41,232 INFO L85 PathProgramCache]: Analyzing trace with hash 64795745, now seen corresponding path program 2 times [2022-01-18 04:01:41,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:41,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081733045] [2022-01-18 04:01:41,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:41,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:01:41,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:41,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081733045] [2022-01-18 04:01:41,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081733045] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:41,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044904808] [2022-01-18 04:01:41,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:01:41,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:41,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:41,313 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) [2022-01-18 04:01:41,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 04:01:41,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:01:41,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:01:41,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 04:01:41,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:01:41,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:41,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-18 04:01:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:01:41,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044904808] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:41,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:41,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-18 04:01:41,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263369433] [2022-01-18 04:01:41,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:41,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:01:41,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:41,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:01:41,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:01:41,816 INFO L87 Difference]: Start difference. First operand 2366 states and 8731 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:42,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:42,445 INFO L93 Difference]: Finished difference Result 6103 states and 21705 transitions. [2022-01-18 04:01:42,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:01:42,445 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 04:01:42,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:42,458 INFO L225 Difference]: With dead ends: 6103 [2022-01-18 04:01:42,458 INFO L226 Difference]: Without dead ends: 5434 [2022-01-18 04:01:42,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:01:42,459 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 494 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:42,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 471 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:01:42,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2022-01-18 04:01:42,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 3427. [2022-01-18 04:01:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 3.7802101576182134) internal successors, (12951), 3426 states have internal predecessors, (12951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:42,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 12951 transitions. [2022-01-18 04:01:42,544 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 12951 transitions. Word has length 24 [2022-01-18 04:01:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:42,544 INFO L470 AbstractCegarLoop]: Abstraction has 3427 states and 12951 transitions. [2022-01-18 04:01:42,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:42,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 12951 transitions. [2022-01-18 04:01:42,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 04:01:42,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:42,554 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:42,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:42,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 04:01:42,776 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:42,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:42,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1659948581, now seen corresponding path program 1 times [2022-01-18 04:01:42,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:42,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830609900] [2022-01-18 04:01:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:42,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:42,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:42,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830609900] [2022-01-18 04:01:42,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830609900] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:42,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445650949] [2022-01-18 04:01:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:42,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:42,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:42,858 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) [2022-01-18 04:01:42,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 04:01:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:42,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 04:01:42,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:42,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 04:01:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:43,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:43,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:43,053 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 17 treesize of output 21 [2022-01-18 04:01:43,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:43,093 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:01:43,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:43,099 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 16 treesize of output 20 [2022-01-18 04:01:43,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:43,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445650949] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:43,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:43,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-01-18 04:01:43,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771595932] [2022-01-18 04:01:43,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:43,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 04:01:43,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:43,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 04:01:43,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-18 04:01:43,124 INFO L87 Difference]: Start difference. First operand 3427 states and 12951 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:43,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:43,457 INFO L93 Difference]: Finished difference Result 6252 states and 22222 transitions. [2022-01-18 04:01:43,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:01:43,458 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 04:01:43,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:43,468 INFO L225 Difference]: With dead ends: 6252 [2022-01-18 04:01:43,469 INFO L226 Difference]: Without dead ends: 5110 [2022-01-18 04:01:43,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:01:43,469 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 150 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:43,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 209 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:01:43,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5110 states. [2022-01-18 04:01:43,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5110 to 2783. [2022-01-18 04:01:43,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 3.6746944644140904) internal successors, (10223), 2782 states have internal predecessors, (10223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:43,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 10223 transitions. [2022-01-18 04:01:43,554 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 10223 transitions. Word has length 24 [2022-01-18 04:01:43,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:43,554 INFO L470 AbstractCegarLoop]: Abstraction has 2783 states and 10223 transitions. [2022-01-18 04:01:43,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:43,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 10223 transitions. [2022-01-18 04:01:43,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 04:01:43,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:43,560 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:43,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:43,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 04:01:43,782 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:43,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:43,783 INFO L85 PathProgramCache]: Analyzing trace with hash 364222817, now seen corresponding path program 2 times [2022-01-18 04:01:43,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:43,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861412665] [2022-01-18 04:01:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:43,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:43,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:43,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861412665] [2022-01-18 04:01:43,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861412665] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:43,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717232561] [2022-01-18 04:01:43,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:01:43,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:43,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:43,853 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) [2022-01-18 04:01:43,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 04:01:43,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:01:43,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:01:43,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 04:01:43,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:43,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 04:01:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:44,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:44,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:44,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 04:01:44,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:44,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:01:44,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:44,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 04:01:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:44,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717232561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:44,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:44,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-01-18 04:01:44,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089582107] [2022-01-18 04:01:44,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:44,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 04:01:44,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:44,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 04:01:44,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-18 04:01:44,104 INFO L87 Difference]: Start difference. First operand 2783 states and 10223 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:44,405 INFO L93 Difference]: Finished difference Result 6449 states and 22980 transitions. [2022-01-18 04:01:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:01:44,405 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 04:01:44,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:44,423 INFO L225 Difference]: With dead ends: 6449 [2022-01-18 04:01:44,423 INFO L226 Difference]: Without dead ends: 6404 [2022-01-18 04:01:44,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:01:44,424 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 184 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:44,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 178 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:01:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6404 states. [2022-01-18 04:01:44,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6404 to 3449. [2022-01-18 04:01:44,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3448 states have (on average 3.7375290023201857) internal successors, (12887), 3448 states have internal predecessors, (12887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:44,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 12887 transitions. [2022-01-18 04:01:44,540 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 12887 transitions. Word has length 24 [2022-01-18 04:01:44,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:44,540 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 12887 transitions. [2022-01-18 04:01:44,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:44,540 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 12887 transitions. [2022-01-18 04:01:44,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 04:01:44,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:44,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:44,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:44,771 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,SelfDestructingSolverStorable16 [2022-01-18 04:01:44,771 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:44,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:44,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1300430463, now seen corresponding path program 1 times [2022-01-18 04:01:44,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:44,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301173537] [2022-01-18 04:01:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:44,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:44,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:44,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301173537] [2022-01-18 04:01:44,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301173537] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:44,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248521829] [2022-01-18 04:01:44,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:44,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:44,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:44,957 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) [2022-01-18 04:01:44,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 04:01:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:44,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 04:01:44,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:45,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:45,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:45,576 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-18 04:01:45,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:45,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-18 04:01:45,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:45,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 28 [2022-01-18 04:01:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:45,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248521829] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:45,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:45,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2022-01-18 04:01:45,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147549939] [2022-01-18 04:01:45,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:45,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:01:45,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:45,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:01:45,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:01:45,819 INFO L87 Difference]: Start difference. First operand 3449 states and 12887 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:46,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:46,454 INFO L93 Difference]: Finished difference Result 5722 states and 20599 transitions. [2022-01-18 04:01:46,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 04:01:46,454 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 04:01:46,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:46,470 INFO L225 Difference]: With dead ends: 5722 [2022-01-18 04:01:46,470 INFO L226 Difference]: Without dead ends: 5018 [2022-01-18 04:01:46,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:01:46,471 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 278 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:46,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 248 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:01:46,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2022-01-18 04:01:46,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 3923. [2022-01-18 04:01:46,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3923 states, 3922 states have (on average 3.752677205507394) internal successors, (14718), 3922 states have internal predecessors, (14718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3923 states to 3923 states and 14718 transitions. [2022-01-18 04:01:46,575 INFO L78 Accepts]: Start accepts. Automaton has 3923 states and 14718 transitions. Word has length 24 [2022-01-18 04:01:46,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:46,575 INFO L470 AbstractCegarLoop]: Abstraction has 3923 states and 14718 transitions. [2022-01-18 04:01:46,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:46,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3923 states and 14718 transitions. [2022-01-18 04:01:46,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 04:01:46,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:46,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:46,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:46,790 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,SelfDestructingSolverStorable17 [2022-01-18 04:01:46,790 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:46,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:46,790 INFO L85 PathProgramCache]: Analyzing trace with hash -310047807, now seen corresponding path program 1 times [2022-01-18 04:01:46,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:46,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359291341] [2022-01-18 04:01:46,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:46,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:46,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:46,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359291341] [2022-01-18 04:01:46,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359291341] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:46,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215901593] [2022-01-18 04:01:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:46,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:46,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:46,889 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) [2022-01-18 04:01:46,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 04:01:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:46,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 04:01:46,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:47,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:47,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:47,295 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 37 treesize of output 39 [2022-01-18 04:01:47,438 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:47,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 04:01:47,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:47,443 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 22 treesize of output 26 [2022-01-18 04:01:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:47,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215901593] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:47,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:47,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-18 04:01:47,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056234438] [2022-01-18 04:01:47,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:47,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:01:47,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:47,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:01:47,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:01:47,510 INFO L87 Difference]: Start difference. First operand 3923 states and 14718 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 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) [2022-01-18 04:01:47,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:47,907 INFO L93 Difference]: Finished difference Result 5006 states and 17977 transitions. [2022-01-18 04:01:47,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:01:47,911 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 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) Word has length 24 [2022-01-18 04:01:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:47,922 INFO L225 Difference]: With dead ends: 5006 [2022-01-18 04:01:47,923 INFO L226 Difference]: Without dead ends: 4270 [2022-01-18 04:01:47,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:01:47,924 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 324 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:47,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 153 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:01:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2022-01-18 04:01:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 3699. [2022-01-18 04:01:48,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3699 states, 3698 states have (on average 3.7420227149810708) internal successors, (13838), 3698 states have internal predecessors, (13838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:48,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 13838 transitions. [2022-01-18 04:01:48,015 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 13838 transitions. Word has length 24 [2022-01-18 04:01:48,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:48,015 INFO L470 AbstractCegarLoop]: Abstraction has 3699 states and 13838 transitions. [2022-01-18 04:01:48,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 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) [2022-01-18 04:01:48,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 13838 transitions. [2022-01-18 04:01:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 04:01:48,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:48,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:48,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:48,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:48,247 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:48,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:48,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1944744923, now seen corresponding path program 1 times [2022-01-18 04:01:48,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:48,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696548869] [2022-01-18 04:01:48,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:48,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:48,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:48,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696548869] [2022-01-18 04:01:48,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696548869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:48,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147186051] [2022-01-18 04:01:48,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:48,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:48,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:48,305 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) [2022-01-18 04:01:48,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 04:01:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:48,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 04:01:48,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:48,441 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 15 treesize of output 11 [2022-01-18 04:01:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:48,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:48,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:48,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 04:01:48,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:48,556 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 20 treesize of output 24 [2022-01-18 04:01:48,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:48,562 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 20 treesize of output 24 [2022-01-18 04:01:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:48,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147186051] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:48,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:48,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-01-18 04:01:48,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853556096] [2022-01-18 04:01:48,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:48,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 04:01:48,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:48,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 04:01:48,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 04:01:48,589 INFO L87 Difference]: Start difference. First operand 3699 states and 13838 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2022-01-18 04:01:48,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:48,795 INFO L93 Difference]: Finished difference Result 4513 states and 16366 transitions. [2022-01-18 04:01:48,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:01:48,795 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) Word has length 24 [2022-01-18 04:01:48,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:48,805 INFO L225 Difference]: With dead ends: 4513 [2022-01-18 04:01:48,805 INFO L226 Difference]: Without dead ends: 4326 [2022-01-18 04:01:48,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:01:48,806 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 177 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:48,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 162 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:01:48,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2022-01-18 04:01:48,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3572. [2022-01-18 04:01:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3572 states, 3571 states have (on average 3.7306076729207507) internal successors, (13322), 3571 states have internal predecessors, (13322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:48,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3572 states to 3572 states and 13322 transitions. [2022-01-18 04:01:48,896 INFO L78 Accepts]: Start accepts. Automaton has 3572 states and 13322 transitions. Word has length 24 [2022-01-18 04:01:48,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:48,896 INFO L470 AbstractCegarLoop]: Abstraction has 3572 states and 13322 transitions. [2022-01-18 04:01:48,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2022-01-18 04:01:48,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3572 states and 13322 transitions. [2022-01-18 04:01:48,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 04:01:48,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:48,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:48,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:49,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:49,119 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:49,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:49,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2018102235, now seen corresponding path program 3 times [2022-01-18 04:01:49,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:49,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810394982] [2022-01-18 04:01:49,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:49,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:49,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:49,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810394982] [2022-01-18 04:01:49,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810394982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:49,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837451016] [2022-01-18 04:01:49,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:01:49,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:49,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:49,195 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) [2022-01-18 04:01:49,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 04:01:49,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:01:49,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:01:49,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 04:01:49,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:49,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 04:01:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:49,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:49,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:49,350 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 04:01:49,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:49,368 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 20 treesize of output 24 [2022-01-18 04:01:49,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:49,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:01:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:49,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837451016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:49,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:49,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-01-18 04:01:49,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844711250] [2022-01-18 04:01:49,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:49,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 04:01:49,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:49,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 04:01:49,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 04:01:49,414 INFO L87 Difference]: Start difference. First operand 3572 states and 13322 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:49,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:49,601 INFO L93 Difference]: Finished difference Result 4056 states and 14546 transitions. [2022-01-18 04:01:49,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:01:49,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 04:01:49,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:49,608 INFO L225 Difference]: With dead ends: 4056 [2022-01-18 04:01:49,608 INFO L226 Difference]: Without dead ends: 3564 [2022-01-18 04:01:49,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:01:49,609 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 144 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:49,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 128 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:01:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2022-01-18 04:01:49,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 3118. [2022-01-18 04:01:49,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3118 states, 3117 states have (on average 3.7388514597369267) internal successors, (11654), 3117 states have internal predecessors, (11654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:49,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3118 states to 3118 states and 11654 transitions. [2022-01-18 04:01:49,654 INFO L78 Accepts]: Start accepts. Automaton has 3118 states and 11654 transitions. Word has length 24 [2022-01-18 04:01:49,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:49,654 INFO L470 AbstractCegarLoop]: Abstraction has 3118 states and 11654 transitions. [2022-01-18 04:01:49,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:49,655 INFO L276 IsEmpty]: Start isEmpty. Operand 3118 states and 11654 transitions. [2022-01-18 04:01:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 04:01:49,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:49,660 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:49,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:49,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:49,862 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:49,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:49,863 INFO L85 PathProgramCache]: Analyzing trace with hash -451668925, now seen corresponding path program 4 times [2022-01-18 04:01:49,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:49,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620061953] [2022-01-18 04:01:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:49,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:49,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:49,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620061953] [2022-01-18 04:01:49,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620061953] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:49,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505794329] [2022-01-18 04:01:49,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:01:49,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:49,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:49,919 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) [2022-01-18 04:01:49,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 04:01:49,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:01:49,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:01:49,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 04:01:49,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:50,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:01:50,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:50,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:50,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:50,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 04:01:50,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:50,093 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:01:50,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:50,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:01:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:50,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505794329] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:50,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:50,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-01-18 04:01:50,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837189376] [2022-01-18 04:01:50,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:50,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 04:01:50,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:50,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 04:01:50,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 04:01:50,133 INFO L87 Difference]: Start difference. First operand 3118 states and 11654 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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) [2022-01-18 04:01:50,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:50,336 INFO L93 Difference]: Finished difference Result 3582 states and 13262 transitions. [2022-01-18 04:01:50,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:01:50,336 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 24 [2022-01-18 04:01:50,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:50,343 INFO L225 Difference]: With dead ends: 3582 [2022-01-18 04:01:50,344 INFO L226 Difference]: Without dead ends: 3582 [2022-01-18 04:01:50,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:01:50,344 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 139 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:50,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 120 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:01:50,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2022-01-18 04:01:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 3326. [2022-01-18 04:01:50,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 3325 states have (on average 3.732330827067669) internal successors, (12410), 3325 states have internal predecessors, (12410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:50,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 12410 transitions. [2022-01-18 04:01:50,403 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 12410 transitions. Word has length 24 [2022-01-18 04:01:50,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:50,403 INFO L470 AbstractCegarLoop]: Abstraction has 3326 states and 12410 transitions. [2022-01-18 04:01:50,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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) [2022-01-18 04:01:50,404 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 12410 transitions. [2022-01-18 04:01:50,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 04:01:50,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:50,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:50,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:50,611 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,SelfDestructingSolverStorable21 [2022-01-18 04:01:50,611 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:50,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:50,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1138655409, now seen corresponding path program 5 times [2022-01-18 04:01:50,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:50,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272879369] [2022-01-18 04:01:50,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:50,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:50,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:50,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272879369] [2022-01-18 04:01:50,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272879369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:50,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557204429] [2022-01-18 04:01:50,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:01:50,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:50,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:50,671 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) [2022-01-18 04:01:50,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 04:01:50,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:01:50,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:01:50,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 04:01:50,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:50,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 04:01:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:50,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:50,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:50,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 04:01:50,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:50,871 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:01:50,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:50,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:01:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:50,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557204429] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:50,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:50,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-01-18 04:01:50,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32847837] [2022-01-18 04:01:50,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:50,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 04:01:50,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:50,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 04:01:50,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 04:01:50,919 INFO L87 Difference]: Start difference. First operand 3326 states and 12410 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2022-01-18 04:01:51,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:51,123 INFO L93 Difference]: Finished difference Result 5484 states and 19412 transitions. [2022-01-18 04:01:51,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:01:51,124 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) Word has length 24 [2022-01-18 04:01:51,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:51,134 INFO L225 Difference]: With dead ends: 5484 [2022-01-18 04:01:51,134 INFO L226 Difference]: Without dead ends: 5044 [2022-01-18 04:01:51,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:01:51,135 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 183 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:51,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 137 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:01:51,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5044 states. [2022-01-18 04:01:51,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5044 to 2987. [2022-01-18 04:01:51,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2987 states, 2986 states have (on average 3.672136637642331) internal successors, (10965), 2986 states have internal predecessors, (10965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:51,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2987 states to 2987 states and 10965 transitions. [2022-01-18 04:01:51,194 INFO L78 Accepts]: Start accepts. Automaton has 2987 states and 10965 transitions. Word has length 24 [2022-01-18 04:01:51,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:51,194 INFO L470 AbstractCegarLoop]: Abstraction has 2987 states and 10965 transitions. [2022-01-18 04:01:51,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2022-01-18 04:01:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2987 states and 10965 transitions. [2022-01-18 04:01:51,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 04:01:51,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:51,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:51,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:51,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:51,401 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:51,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:51,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1763827543, now seen corresponding path program 6 times [2022-01-18 04:01:51,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:51,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506442231] [2022-01-18 04:01:51,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:51,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:51,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:51,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506442231] [2022-01-18 04:01:51,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506442231] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:51,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195660202] [2022-01-18 04:01:51,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:01:51,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:51,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:51,455 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) [2022-01-18 04:01:51,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 04:01:51,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:01:51,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:01:51,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 04:01:51,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:51,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:01:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:51,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:51,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:51,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 04:01:51,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:51,636 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 20 treesize of output 24 [2022-01-18 04:01:51,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:51,640 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 20 treesize of output 24 [2022-01-18 04:01:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:51,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195660202] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:51,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:51,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-01-18 04:01:51,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651688119] [2022-01-18 04:01:51,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:51,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 04:01:51,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:51,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 04:01:51,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 04:01:51,672 INFO L87 Difference]: Start difference. First operand 2987 states and 10965 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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) [2022-01-18 04:01:51,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:51,846 INFO L93 Difference]: Finished difference Result 3479 states and 12527 transitions. [2022-01-18 04:01:51,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:01:51,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 24 [2022-01-18 04:01:51,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:51,853 INFO L225 Difference]: With dead ends: 3479 [2022-01-18 04:01:51,853 INFO L226 Difference]: Without dead ends: 3479 [2022-01-18 04:01:51,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:01:51,853 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 167 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:51,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 110 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:01:51,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3479 states. [2022-01-18 04:01:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3479 to 2946. [2022-01-18 04:01:51,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2945 states have (on average 3.6512733446519525) internal successors, (10753), 2945 states have internal predecessors, (10753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 10753 transitions. [2022-01-18 04:01:51,897 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 10753 transitions. Word has length 24 [2022-01-18 04:01:51,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:51,897 INFO L470 AbstractCegarLoop]: Abstraction has 2946 states and 10753 transitions. [2022-01-18 04:01:51,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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) [2022-01-18 04:01:51,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 10753 transitions. [2022-01-18 04:01:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 04:01:51,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:51,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:51,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:52,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:52,103 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:52,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:52,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1785525385, now seen corresponding path program 2 times [2022-01-18 04:01:52,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:52,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663772115] [2022-01-18 04:01:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:52,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:52,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:52,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663772115] [2022-01-18 04:01:52,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663772115] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:52,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62062682] [2022-01-18 04:01:52,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:01:52,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:52,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:52,271 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) [2022-01-18 04:01:52,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 04:01:52,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:01:52,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:01:52,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 04:01:52,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:52,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:52,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:52,799 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 34 treesize of output 36 [2022-01-18 04:01:52,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:52,869 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-01-18 04:01:52,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:52,876 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 04:01:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:52,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62062682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:52,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:52,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2022-01-18 04:01:52,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170446283] [2022-01-18 04:01:52,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:52,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:01:52,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:52,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:01:52,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:01:52,994 INFO L87 Difference]: Start difference. First operand 2946 states and 10753 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:53,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:53,481 INFO L93 Difference]: Finished difference Result 4316 states and 15141 transitions. [2022-01-18 04:01:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:01:53,482 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 04:01:53,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:53,489 INFO L225 Difference]: With dead ends: 4316 [2022-01-18 04:01:53,489 INFO L226 Difference]: Without dead ends: 3494 [2022-01-18 04:01:53,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:01:53,490 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 280 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:53,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 187 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:01:53,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3494 states. [2022-01-18 04:01:53,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3494 to 2770. [2022-01-18 04:01:53,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2770 states, 2769 states have (on average 3.6796677500902852) internal successors, (10189), 2769 states have internal predecessors, (10189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 10189 transitions. [2022-01-18 04:01:53,536 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 10189 transitions. Word has length 24 [2022-01-18 04:01:53,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:53,536 INFO L470 AbstractCegarLoop]: Abstraction has 2770 states and 10189 transitions. [2022-01-18 04:01:53,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:53,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 10189 transitions. [2022-01-18 04:01:53,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 04:01:53,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:53,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:53,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:53,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:53,751 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:53,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:53,751 INFO L85 PathProgramCache]: Analyzing trace with hash -2054099859, now seen corresponding path program 3 times [2022-01-18 04:01:53,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:53,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995171762] [2022-01-18 04:01:53,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:53,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:01:53,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:53,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995171762] [2022-01-18 04:01:53,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995171762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:53,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616055557] [2022-01-18 04:01:53,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:01:53,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:53,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:53,801 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) [2022-01-18 04:01:53,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 04:01:53,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:01:53,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:01:53,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 04:01:53,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:54,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:54,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-18 04:01:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:01:54,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616055557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:54,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:54,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2022-01-18 04:01:54,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142243399] [2022-01-18 04:01:54,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:54,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:01:54,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:54,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:01:54,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:01:54,463 INFO L87 Difference]: Start difference. First operand 2770 states and 10189 transitions. Second operand has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:59,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:59,024 INFO L93 Difference]: Finished difference Result 15344 states and 53305 transitions. [2022-01-18 04:01:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-18 04:01:59,024 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 04:01:59,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:59,056 INFO L225 Difference]: With dead ends: 15344 [2022-01-18 04:01:59,056 INFO L226 Difference]: Without dead ends: 11515 [2022-01-18 04:01:59,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4963 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2342, Invalid=12664, Unknown=0, NotChecked=0, Total=15006 [2022-01-18 04:01:59,060 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 1073 mSDsluCounter, 2176 mSDsCounter, 0 mSdLazyCounter, 4659 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 4811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 4659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:59,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1073 Valid, 1518 Invalid, 4811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 4659 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-18 04:01:59,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11515 states. [2022-01-18 04:01:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11515 to 5300. [2022-01-18 04:01:59,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5300 states, 5299 states have (on average 3.811851292696735) internal successors, (20199), 5299 states have internal predecessors, (20199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:59,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5300 states to 5300 states and 20199 transitions. [2022-01-18 04:01:59,230 INFO L78 Accepts]: Start accepts. Automaton has 5300 states and 20199 transitions. Word has length 27 [2022-01-18 04:01:59,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:01:59,230 INFO L470 AbstractCegarLoop]: Abstraction has 5300 states and 20199 transitions. [2022-01-18 04:01:59,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:01:59,230 INFO L276 IsEmpty]: Start isEmpty. Operand 5300 states and 20199 transitions. [2022-01-18 04:01:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 04:01:59,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:01:59,241 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:01:59,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 04:01:59,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-18 04:01:59,441 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:01:59,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:01:59,442 INFO L85 PathProgramCache]: Analyzing trace with hash -719511607, now seen corresponding path program 1 times [2022-01-18 04:01:59,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:01:59,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189867799] [2022-01-18 04:01:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:59,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:01:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:01:59,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:01:59,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189867799] [2022-01-18 04:01:59,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189867799] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:01:59,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614801586] [2022-01-18 04:01:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:01:59,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:01:59,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:01:59,500 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) [2022-01-18 04:01:59,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 04:01:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:01:59,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 04:01:59,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:01:59,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:01:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 04:01:59,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:01:59,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:59,661 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 04:01:59,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:59,707 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:01:59,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:01:59,710 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 20 treesize of output 24 [2022-01-18 04:01:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 04:01:59,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614801586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:01:59,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:01:59,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-01-18 04:01:59,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589267508] [2022-01-18 04:01:59,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:01:59,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 04:01:59,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:01:59,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 04:01:59,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 04:01:59,737 INFO L87 Difference]: Start difference. First operand 5300 states and 20199 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2022-01-18 04:01:59,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:01:59,941 INFO L93 Difference]: Finished difference Result 7207 states and 26780 transitions. [2022-01-18 04:01:59,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:01:59,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) Word has length 27 [2022-01-18 04:01:59,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:01:59,964 INFO L225 Difference]: With dead ends: 7207 [2022-01-18 04:01:59,964 INFO L226 Difference]: Without dead ends: 6969 [2022-01-18 04:01:59,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:01:59,966 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 162 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:01:59,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 119 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:01:59,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6969 states. [2022-01-18 04:02:00,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6969 to 6099. [2022-01-18 04:02:00,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6099 states, 6098 states have (on average 3.791571006887504) internal successors, (23121), 6098 states have internal predecessors, (23121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:00,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6099 states to 6099 states and 23121 transitions. [2022-01-18 04:02:00,118 INFO L78 Accepts]: Start accepts. Automaton has 6099 states and 23121 transitions. Word has length 27 [2022-01-18 04:02:00,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:00,118 INFO L470 AbstractCegarLoop]: Abstraction has 6099 states and 23121 transitions. [2022-01-18 04:02:00,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2022-01-18 04:02:00,118 INFO L276 IsEmpty]: Start isEmpty. Operand 6099 states and 23121 transitions. [2022-01-18 04:02:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 04:02:00,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:00,131 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:00,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 04:02:00,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 04:02:00,353 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:00,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:00,353 INFO L85 PathProgramCache]: Analyzing trace with hash 874695761, now seen corresponding path program 4 times [2022-01-18 04:02:00,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:00,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887558535] [2022-01-18 04:02:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:00,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:00,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:00,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887558535] [2022-01-18 04:02:00,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887558535] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:00,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95121411] [2022-01-18 04:02:00,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:02:00,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:00,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:00,402 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) [2022-01-18 04:02:00,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 04:02:00,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:02:00,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:02:00,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 04:02:00,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:00,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:00,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-18 04:02:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:00,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95121411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:00,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:00,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 9 [2022-01-18 04:02:00,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106093447] [2022-01-18 04:02:00,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:00,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 04:02:00,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:00,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 04:02:00,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-18 04:02:00,625 INFO L87 Difference]: Start difference. First operand 6099 states and 23121 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2022-01-18 04:02:00,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:00,901 INFO L93 Difference]: Finished difference Result 12007 states and 44247 transitions. [2022-01-18 04:02:00,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:02:00,902 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) Word has length 27 [2022-01-18 04:02:00,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:00,931 INFO L225 Difference]: With dead ends: 12007 [2022-01-18 04:02:00,932 INFO L226 Difference]: Without dead ends: 11371 [2022-01-18 04:02:00,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:02:00,932 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 239 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:00,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 268 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:02:00,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11371 states. [2022-01-18 04:02:01,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11371 to 6822. [2022-01-18 04:02:01,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6822 states, 6821 states have (on average 3.8425450813663686) internal successors, (26210), 6821 states have internal predecessors, (26210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:01,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 26210 transitions. [2022-01-18 04:02:01,142 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 26210 transitions. Word has length 27 [2022-01-18 04:02:01,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:01,142 INFO L470 AbstractCegarLoop]: Abstraction has 6822 states and 26210 transitions. [2022-01-18 04:02:01,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2022-01-18 04:02:01,142 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 26210 transitions. [2022-01-18 04:02:01,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 04:02:01,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:01,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:01,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-18 04:02:01,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 04:02:01,355 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:01,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:01,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1192875703, now seen corresponding path program 5 times [2022-01-18 04:02:01,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:01,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650569207] [2022-01-18 04:02:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:01,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:01,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:01,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650569207] [2022-01-18 04:02:01,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650569207] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:01,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912160038] [2022-01-18 04:02:01,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:02:01,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:01,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:01,410 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) [2022-01-18 04:02:01,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 04:02:01,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:02:01,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:02:01,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 04:02:01,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:01,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:01,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-18 04:02:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:01,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912160038] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:01,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:01,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 11 [2022-01-18 04:02:01,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742972081] [2022-01-18 04:02:01,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:01,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 04:02:01,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:01,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 04:02:01,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-18 04:02:01,658 INFO L87 Difference]: Start difference. First operand 6822 states and 26210 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:01,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:01,904 INFO L93 Difference]: Finished difference Result 10691 states and 39400 transitions. [2022-01-18 04:02:01,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:02:01,905 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 04:02:01,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:01,930 INFO L225 Difference]: With dead ends: 10691 [2022-01-18 04:02:01,930 INFO L226 Difference]: Without dead ends: 9957 [2022-01-18 04:02:01,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:02:01,931 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 182 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:01,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 286 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:02:01,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9957 states. [2022-01-18 04:02:02,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9957 to 6855. [2022-01-18 04:02:02,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6855 states, 6854 states have (on average 3.824044353662095) internal successors, (26210), 6854 states have internal predecessors, (26210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:02,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6855 states to 6855 states and 26210 transitions. [2022-01-18 04:02:02,121 INFO L78 Accepts]: Start accepts. Automaton has 6855 states and 26210 transitions. Word has length 27 [2022-01-18 04:02:02,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:02,121 INFO L470 AbstractCegarLoop]: Abstraction has 6855 states and 26210 transitions. [2022-01-18 04:02:02,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:02,122 INFO L276 IsEmpty]: Start isEmpty. Operand 6855 states and 26210 transitions. [2022-01-18 04:02:02,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 04:02:02,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:02,134 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:02,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 04:02:02,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:02,335 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:02,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:02,335 INFO L85 PathProgramCache]: Analyzing trace with hash -144799379, now seen corresponding path program 6 times [2022-01-18 04:02:02,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:02,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634792777] [2022-01-18 04:02:02,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:02,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:02,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:02,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634792777] [2022-01-18 04:02:02,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634792777] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:02,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005511565] [2022-01-18 04:02:02,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:02:02,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:02,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:02,409 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) [2022-01-18 04:02:02,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 04:02:02,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:02:02,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:02:02,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 04:02:02,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:02,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:02,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-18 04:02:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:02,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005511565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:02,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:02,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-01-18 04:02:02,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391881687] [2022-01-18 04:02:02,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:02,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 04:02:02,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:02,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 04:02:02,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 04:02:02,641 INFO L87 Difference]: Start difference. First operand 6855 states and 26210 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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) [2022-01-18 04:02:02,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:02,813 INFO L93 Difference]: Finished difference Result 11732 states and 43817 transitions. [2022-01-18 04:02:02,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:02:02,813 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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 27 [2022-01-18 04:02:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:02,842 INFO L225 Difference]: With dead ends: 11732 [2022-01-18 04:02:02,842 INFO L226 Difference]: Without dead ends: 11351 [2022-01-18 04:02:02,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-01-18 04:02:02,843 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 246 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:02,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 145 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:02:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11351 states. [2022-01-18 04:02:02,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11351 to 8024. [2022-01-18 04:02:02,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8024 states, 8023 states have (on average 3.9000373924965723) internal successors, (31290), 8023 states have internal predecessors, (31290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:03,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8024 states to 8024 states and 31290 transitions. [2022-01-18 04:02:03,018 INFO L78 Accepts]: Start accepts. Automaton has 8024 states and 31290 transitions. Word has length 27 [2022-01-18 04:02:03,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:03,018 INFO L470 AbstractCegarLoop]: Abstraction has 8024 states and 31290 transitions. [2022-01-18 04:02:03,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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) [2022-01-18 04:02:03,019 INFO L276 IsEmpty]: Start isEmpty. Operand 8024 states and 31290 transitions. [2022-01-18 04:02:03,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 04:02:03,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:03,032 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:03,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 04:02:03,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:03,233 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:03,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:03,233 INFO L85 PathProgramCache]: Analyzing trace with hash 173380563, now seen corresponding path program 7 times [2022-01-18 04:02:03,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:03,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450828062] [2022-01-18 04:02:03,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:03,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:03,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:03,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450828062] [2022-01-18 04:02:03,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450828062] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:03,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264278968] [2022-01-18 04:02:03,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:02:03,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:03,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:03,294 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) [2022-01-18 04:02:03,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 04:02:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:03,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 04:02:03,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:03,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:03,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-18 04:02:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:03,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264278968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:03,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:03,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 04:02:03,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678280580] [2022-01-18 04:02:03,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:03,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 04:02:03,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:03,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 04:02:03,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-18 04:02:03,543 INFO L87 Difference]: Start difference. First operand 8024 states and 31290 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:03,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:03,708 INFO L93 Difference]: Finished difference Result 11702 states and 43501 transitions. [2022-01-18 04:02:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 04:02:03,708 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 04:02:03,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:03,735 INFO L225 Difference]: With dead ends: 11702 [2022-01-18 04:02:03,735 INFO L226 Difference]: Without dead ends: 11257 [2022-01-18 04:02:03,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-01-18 04:02:03,737 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 140 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:03,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 131 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:02:03,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11257 states. [2022-01-18 04:02:03,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 8003. [2022-01-18 04:02:03,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8003 states, 8002 states have (on average 3.8975256185953513) internal successors, (31188), 8002 states have internal predecessors, (31188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:03,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8003 states to 8003 states and 31188 transitions. [2022-01-18 04:02:03,946 INFO L78 Accepts]: Start accepts. Automaton has 8003 states and 31188 transitions. Word has length 27 [2022-01-18 04:02:03,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:03,947 INFO L470 AbstractCegarLoop]: Abstraction has 8003 states and 31188 transitions. [2022-01-18 04:02:03,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:03,947 INFO L276 IsEmpty]: Start isEmpty. Operand 8003 states and 31188 transitions. [2022-01-18 04:02:03,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 04:02:03,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:03,961 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:03,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 04:02:04,162 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,SelfDestructingSolverStorable30 [2022-01-18 04:02:04,162 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:04,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:04,163 INFO L85 PathProgramCache]: Analyzing trace with hash -586208403, now seen corresponding path program 8 times [2022-01-18 04:02:04,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:04,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954094706] [2022-01-18 04:02:04,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:04,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:04,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:04,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954094706] [2022-01-18 04:02:04,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954094706] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:04,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278168775] [2022-01-18 04:02:04,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:02:04,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:04,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:04,222 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) [2022-01-18 04:02:04,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 04:02:04,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:02:04,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:02:04,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 04:02:04,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:04,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:04,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-18 04:02:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:04,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278168775] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:04,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:04,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2022-01-18 04:02:04,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718825860] [2022-01-18 04:02:04,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:04,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:02:04,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:04,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:02:04,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:02:04,493 INFO L87 Difference]: Start difference. First operand 8003 states and 31188 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:04,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:04,696 INFO L93 Difference]: Finished difference Result 11237 states and 42020 transitions. [2022-01-18 04:02:04,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:02:04,697 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 04:02:04,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:04,724 INFO L225 Difference]: With dead ends: 11237 [2022-01-18 04:02:04,724 INFO L226 Difference]: Without dead ends: 10762 [2022-01-18 04:02:04,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:02:04,725 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 205 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:04,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 210 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:02:04,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10762 states. [2022-01-18 04:02:04,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10762 to 8335. [2022-01-18 04:02:04,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8335 states, 8334 states have (on average 3.866930645548356) internal successors, (32227), 8334 states have internal predecessors, (32227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:04,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8335 states to 8335 states and 32227 transitions. [2022-01-18 04:02:04,911 INFO L78 Accepts]: Start accepts. Automaton has 8335 states and 32227 transitions. Word has length 27 [2022-01-18 04:02:04,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:04,912 INFO L470 AbstractCegarLoop]: Abstraction has 8335 states and 32227 transitions. [2022-01-18 04:02:04,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:04,912 INFO L276 IsEmpty]: Start isEmpty. Operand 8335 states and 32227 transitions. [2022-01-18 04:02:04,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 04:02:04,927 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:04,927 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:04,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 04:02:05,139 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,SelfDestructingSolverStorable31 [2022-01-18 04:02:05,139 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:05,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:05,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1500826025, now seen corresponding path program 1 times [2022-01-18 04:02:05,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:05,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928810410] [2022-01-18 04:02:05,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:05,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:05,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:05,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928810410] [2022-01-18 04:02:05,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928810410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:02:05,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:02:05,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 04:02:05,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845597497] [2022-01-18 04:02:05,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:02:05,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 04:02:05,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:05,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 04:02:05,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 04:02:05,153 INFO L87 Difference]: Start difference. First operand 8335 states and 32227 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2022-01-18 04:02:05,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:05,210 INFO L93 Difference]: Finished difference Result 9672 states and 36473 transitions. [2022-01-18 04:02:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 04:02:05,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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 27 [2022-01-18 04:02:05,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:05,232 INFO L225 Difference]: With dead ends: 9672 [2022-01-18 04:02:05,232 INFO L226 Difference]: Without dead ends: 9622 [2022-01-18 04:02:05,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 04:02:05,233 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:05,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 61 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:02:05,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9622 states. [2022-01-18 04:02:05,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9622 to 8176. [2022-01-18 04:02:05,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8176 states, 8175 states have (on average 3.8801223241590215) internal successors, (31720), 8175 states have internal predecessors, (31720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8176 states to 8176 states and 31720 transitions. [2022-01-18 04:02:05,440 INFO L78 Accepts]: Start accepts. Automaton has 8176 states and 31720 transitions. Word has length 27 [2022-01-18 04:02:05,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:05,440 INFO L470 AbstractCegarLoop]: Abstraction has 8176 states and 31720 transitions. [2022-01-18 04:02:05,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2022-01-18 04:02:05,440 INFO L276 IsEmpty]: Start isEmpty. Operand 8176 states and 31720 transitions. [2022-01-18 04:02:05,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 04:02:05,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:05,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:05,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-18 04:02:05,456 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:05,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:05,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1265490017, now seen corresponding path program 2 times [2022-01-18 04:02:05,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:05,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105757405] [2022-01-18 04:02:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:05,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:05,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:05,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105757405] [2022-01-18 04:02:05,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105757405] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:05,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776210206] [2022-01-18 04:02:05,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:02:05,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:05,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:05,532 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) [2022-01-18 04:02:05,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 04:02:05,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:02:05,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:02:05,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 04:02:05,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:05,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 04:02:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 04:02:05,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:05,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:05,688 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 16 treesize of output 20 [2022-01-18 04:02:05,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:05,728 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 20 treesize of output 24 [2022-01-18 04:02:05,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:05,732 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 20 treesize of output 24 [2022-01-18 04:02:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 04:02:05,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776210206] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:05,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:05,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-01-18 04:02:05,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617586136] [2022-01-18 04:02:05,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:05,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 04:02:05,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:05,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 04:02:05,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 04:02:05,762 INFO L87 Difference]: Start difference. First operand 8176 states and 31720 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2022-01-18 04:02:05,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:05,975 INFO L93 Difference]: Finished difference Result 9264 states and 34871 transitions. [2022-01-18 04:02:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 04:02:05,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) Word has length 27 [2022-01-18 04:02:05,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:05,997 INFO L225 Difference]: With dead ends: 9264 [2022-01-18 04:02:05,997 INFO L226 Difference]: Without dead ends: 9087 [2022-01-18 04:02:05,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-01-18 04:02:05,998 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 101 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:05,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 159 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:02:06,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9087 states. [2022-01-18 04:02:06,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9087 to 8094. [2022-01-18 04:02:06,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8094 states, 8093 states have (on average 3.8840973680958855) internal successors, (31434), 8093 states have internal predecessors, (31434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:06,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8094 states to 8094 states and 31434 transitions. [2022-01-18 04:02:06,145 INFO L78 Accepts]: Start accepts. Automaton has 8094 states and 31434 transitions. Word has length 27 [2022-01-18 04:02:06,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:06,145 INFO L470 AbstractCegarLoop]: Abstraction has 8094 states and 31434 transitions. [2022-01-18 04:02:06,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2022-01-18 04:02:06,146 INFO L276 IsEmpty]: Start isEmpty. Operand 8094 states and 31434 transitions. [2022-01-18 04:02:06,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 04:02:06,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:06,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:06,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-18 04:02:06,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:06,360 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:06,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:06,360 INFO L85 PathProgramCache]: Analyzing trace with hash -19220799, now seen corresponding path program 3 times [2022-01-18 04:02:06,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:06,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21787009] [2022-01-18 04:02:06,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:06,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:06,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:06,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21787009] [2022-01-18 04:02:06,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21787009] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:06,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272714750] [2022-01-18 04:02:06,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:02:06,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:06,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:06,425 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) [2022-01-18 04:02:06,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 04:02:06,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:02:06,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:02:06,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 04:02:06,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:06,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:02:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 04:02:06,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:06,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:06,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 04:02:06,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:06,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:02:06,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:06,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:02:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 04:02:06,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272714750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:06,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:06,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2022-01-18 04:02:06,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658294234] [2022-01-18 04:02:06,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:06,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 04:02:06,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:06,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 04:02:06,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 04:02:06,653 INFO L87 Difference]: Start difference. First operand 8094 states and 31434 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:06,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:06,935 INFO L93 Difference]: Finished difference Result 8720 states and 33494 transitions. [2022-01-18 04:02:06,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:02:06,936 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 04:02:06,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:06,958 INFO L225 Difference]: With dead ends: 8720 [2022-01-18 04:02:06,958 INFO L226 Difference]: Without dead ends: 8720 [2022-01-18 04:02:06,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:02:06,959 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 74 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:06,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 160 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:02:06,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8720 states. [2022-01-18 04:02:07,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8720 to 7844. [2022-01-18 04:02:07,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7844 states, 7843 states have (on average 3.8797653958944283) internal successors, (30429), 7843 states have internal predecessors, (30429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:07,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7844 states to 7844 states and 30429 transitions. [2022-01-18 04:02:07,126 INFO L78 Accepts]: Start accepts. Automaton has 7844 states and 30429 transitions. Word has length 27 [2022-01-18 04:02:07,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:07,126 INFO L470 AbstractCegarLoop]: Abstraction has 7844 states and 30429 transitions. [2022-01-18 04:02:07,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:07,126 INFO L276 IsEmpty]: Start isEmpty. Operand 7844 states and 30429 transitions. [2022-01-18 04:02:07,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 04:02:07,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:07,140 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:07,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 04:02:07,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:07,340 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:07,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:07,341 INFO L85 PathProgramCache]: Analyzing trace with hash -2068589027, now seen corresponding path program 4 times [2022-01-18 04:02:07,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:07,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966188168] [2022-01-18 04:02:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:07,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 04:02:07,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:07,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966188168] [2022-01-18 04:02:07,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966188168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:02:07,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:02:07,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 04:02:07,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337822329] [2022-01-18 04:02:07,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:02:07,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 04:02:07,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:07,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 04:02:07,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 04:02:07,398 INFO L87 Difference]: Start difference. First operand 7844 states and 30429 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2022-01-18 04:02:07,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:07,491 INFO L93 Difference]: Finished difference Result 7690 states and 29836 transitions. [2022-01-18 04:02:07,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 04:02:07,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 27 [2022-01-18 04:02:07,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:07,508 INFO L225 Difference]: With dead ends: 7690 [2022-01-18 04:02:07,508 INFO L226 Difference]: Without dead ends: 7690 [2022-01-18 04:02:07,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 04:02:07,509 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:07,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 32 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:02:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7690 states. [2022-01-18 04:02:07,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7690 to 7690. [2022-01-18 04:02:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7690 states, 7689 states have (on average 3.8803485498764467) internal successors, (29836), 7689 states have internal predecessors, (29836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:07,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7690 states to 7690 states and 29836 transitions. [2022-01-18 04:02:07,629 INFO L78 Accepts]: Start accepts. Automaton has 7690 states and 29836 transitions. Word has length 27 [2022-01-18 04:02:07,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:07,629 INFO L470 AbstractCegarLoop]: Abstraction has 7690 states and 29836 transitions. [2022-01-18 04:02:07,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2022-01-18 04:02:07,629 INFO L276 IsEmpty]: Start isEmpty. Operand 7690 states and 29836 transitions. [2022-01-18 04:02:07,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 04:02:07,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:07,642 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:07,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-18 04:02:07,642 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:07,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:07,642 INFO L85 PathProgramCache]: Analyzing trace with hash -740813211, now seen corresponding path program 5 times [2022-01-18 04:02:07,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:07,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566067251] [2022-01-18 04:02:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:07,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:07,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:07,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566067251] [2022-01-18 04:02:07,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566067251] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:02:07,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:02:07,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 04:02:07,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426459979] [2022-01-18 04:02:07,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:02:07,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 04:02:07,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:07,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 04:02:07,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 04:02:07,700 INFO L87 Difference]: Start difference. First operand 7690 states and 29836 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2022-01-18 04:02:07,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:07,812 INFO L93 Difference]: Finished difference Result 7532 states and 29153 transitions. [2022-01-18 04:02:07,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 04:02:07,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 27 [2022-01-18 04:02:07,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:07,834 INFO L225 Difference]: With dead ends: 7532 [2022-01-18 04:02:07,834 INFO L226 Difference]: Without dead ends: 7360 [2022-01-18 04:02:07,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 04:02:07,835 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:07,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 52 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:02:07,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7360 states. [2022-01-18 04:02:07,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7360 to 7360. [2022-01-18 04:02:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7360 states, 7359 states have (on average 3.900529963310232) internal successors, (28704), 7359 states have internal predecessors, (28704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:07,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7360 states to 7360 states and 28704 transitions. [2022-01-18 04:02:07,971 INFO L78 Accepts]: Start accepts. Automaton has 7360 states and 28704 transitions. Word has length 27 [2022-01-18 04:02:07,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:07,971 INFO L470 AbstractCegarLoop]: Abstraction has 7360 states and 28704 transitions. [2022-01-18 04:02:07,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2022-01-18 04:02:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 7360 states and 28704 transitions. [2022-01-18 04:02:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 04:02:07,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:07,984 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:07,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-18 04:02:07,984 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:07,984 INFO L85 PathProgramCache]: Analyzing trace with hash -461124344, now seen corresponding path program 9 times [2022-01-18 04:02:07,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:07,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477018474] [2022-01-18 04:02:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:07,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:08,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:08,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477018474] [2022-01-18 04:02:08,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477018474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:08,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753811712] [2022-01-18 04:02:08,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:02:08,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:08,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:08,055 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) [2022-01-18 04:02:08,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 04:02:08,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:02:08,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:02:08,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 04:02:08,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 04:02:08,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 04:02:08,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753811712] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:08,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:08,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2022-01-18 04:02:08,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893503821] [2022-01-18 04:02:08,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:08,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:02:08,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:08,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:02:08,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:02:08,559 INFO L87 Difference]: Start difference. First operand 7360 states and 28704 transitions. Second operand has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:09,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:09,829 INFO L93 Difference]: Finished difference Result 22955 states and 87500 transitions. [2022-01-18 04:02:09,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 04:02:09,829 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 04:02:09,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:09,927 INFO L225 Difference]: With dead ends: 22955 [2022-01-18 04:02:09,928 INFO L226 Difference]: Without dead ends: 22289 [2022-01-18 04:02:09,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=456, Invalid=1800, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 04:02:09,929 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 556 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:09,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 502 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 04:02:09,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22289 states. [2022-01-18 04:02:10,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22289 to 13833. [2022-01-18 04:02:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13833 states, 13832 states have (on average 4.011784268363216) internal successors, (55491), 13832 states have internal predecessors, (55491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:10,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13833 states to 13833 states and 55491 transitions. [2022-01-18 04:02:10,442 INFO L78 Accepts]: Start accepts. Automaton has 13833 states and 55491 transitions. Word has length 30 [2022-01-18 04:02:10,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:10,443 INFO L470 AbstractCegarLoop]: Abstraction has 13833 states and 55491 transitions. [2022-01-18 04:02:10,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:10,445 INFO L276 IsEmpty]: Start isEmpty. Operand 13833 states and 55491 transitions. [2022-01-18 04:02:10,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 04:02:10,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:10,485 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:10,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 04:02:10,685 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,SelfDestructingSolverStorable37 [2022-01-18 04:02:10,686 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:10,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:10,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1428684140, now seen corresponding path program 10 times [2022-01-18 04:02:10,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:10,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768047694] [2022-01-18 04:02:10,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:10,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:10,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:10,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768047694] [2022-01-18 04:02:10,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768047694] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:10,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624781051] [2022-01-18 04:02:10,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:02:10,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:10,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:10,872 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) [2022-01-18 04:02:10,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 04:02:10,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:02:10,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:02:10,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 04:02:10,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:11,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:02:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:11,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:11,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:11,182 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:02:11,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:11,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 04:02:11,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:11,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 04:02:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:11,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624781051] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:11,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:11,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2022-01-18 04:02:11,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546876639] [2022-01-18 04:02:11,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:11,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:02:11,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:11,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:02:11,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:02:11,389 INFO L87 Difference]: Start difference. First operand 13833 states and 55491 transitions. Second operand has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:13,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:13,468 INFO L93 Difference]: Finished difference Result 25354 states and 97063 transitions. [2022-01-18 04:02:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 04:02:13,469 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 04:02:13,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:13,557 INFO L225 Difference]: With dead ends: 25354 [2022-01-18 04:02:13,558 INFO L226 Difference]: Without dead ends: 24401 [2022-01-18 04:02:13,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=413, Invalid=2557, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 04:02:13,559 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 591 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 3029 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 3086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:13,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 832 Invalid, 3086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3029 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 04:02:13,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24401 states. [2022-01-18 04:02:13,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24401 to 15204. [2022-01-18 04:02:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15204 states, 15203 states have (on average 3.982437676774321) internal successors, (60545), 15203 states have internal predecessors, (60545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15204 states to 15204 states and 60545 transitions. [2022-01-18 04:02:14,091 INFO L78 Accepts]: Start accepts. Automaton has 15204 states and 60545 transitions. Word has length 30 [2022-01-18 04:02:14,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:14,091 INFO L470 AbstractCegarLoop]: Abstraction has 15204 states and 60545 transitions. [2022-01-18 04:02:14,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:14,091 INFO L276 IsEmpty]: Start isEmpty. Operand 15204 states and 60545 transitions. [2022-01-18 04:02:14,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 04:02:14,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:14,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:14,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 04:02:14,318 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,SelfDestructingSolverStorable38 [2022-01-18 04:02:14,319 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:14,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:14,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1766374196, now seen corresponding path program 11 times [2022-01-18 04:02:14,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:14,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834850888] [2022-01-18 04:02:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:14,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:14,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:14,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834850888] [2022-01-18 04:02:14,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834850888] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:14,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18849207] [2022-01-18 04:02:14,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:02:14,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:14,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:14,451 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) [2022-01-18 04:02:14,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 04:02:14,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:02:14,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:02:14,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 04:02:14,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:14,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:14,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18849207] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:14,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:14,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2022-01-18 04:02:14,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500751724] [2022-01-18 04:02:14,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:14,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 04:02:14,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:14,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 04:02:14,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-18 04:02:14,725 INFO L87 Difference]: Start difference. First operand 15204 states and 60545 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:15,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:15,106 INFO L93 Difference]: Finished difference Result 22758 states and 90020 transitions. [2022-01-18 04:02:15,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:02:15,107 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 04:02:15,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:15,256 INFO L225 Difference]: With dead ends: 22758 [2022-01-18 04:02:15,256 INFO L226 Difference]: Without dead ends: 22730 [2022-01-18 04:02:15,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:02:15,256 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 201 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:15,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 174 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:02:15,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22730 states. [2022-01-18 04:02:15,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22730 to 16009. [2022-01-18 04:02:15,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16009 states, 16008 states have (on average 4.006246876561719) internal successors, (64132), 16008 states have internal predecessors, (64132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:15,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16009 states to 16009 states and 64132 transitions. [2022-01-18 04:02:15,800 INFO L78 Accepts]: Start accepts. Automaton has 16009 states and 64132 transitions. Word has length 30 [2022-01-18 04:02:15,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:15,800 INFO L470 AbstractCegarLoop]: Abstraction has 16009 states and 64132 transitions. [2022-01-18 04:02:15,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:15,800 INFO L276 IsEmpty]: Start isEmpty. Operand 16009 states and 64132 transitions. [2022-01-18 04:02:15,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 04:02:15,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:15,831 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:15,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-18 04:02:16,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 04:02:16,031 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1144493786, now seen corresponding path program 12 times [2022-01-18 04:02:16,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:16,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353899835] [2022-01-18 04:02:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:16,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:16,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:16,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353899835] [2022-01-18 04:02:16,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353899835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:16,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285908467] [2022-01-18 04:02:16,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:02:16,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:16,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:16,114 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) [2022-01-18 04:02:16,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 04:02:16,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:02:16,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:02:16,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 04:02:16,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 04:02:16,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 04:02:16,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285908467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:16,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:16,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-18 04:02:16,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406191226] [2022-01-18 04:02:16,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:16,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:02:16,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:16,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:02:16,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:02:16,565 INFO L87 Difference]: Start difference. First operand 16009 states and 64132 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:17,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:17,080 INFO L93 Difference]: Finished difference Result 28320 states and 110538 transitions. [2022-01-18 04:02:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 04:02:17,080 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 04:02:17,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:17,265 INFO L225 Difference]: With dead ends: 28320 [2022-01-18 04:02:17,266 INFO L226 Difference]: Without dead ends: 27743 [2022-01-18 04:02:17,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:02:17,266 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 571 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:17,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 242 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:02:17,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27743 states. [2022-01-18 04:02:17,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27743 to 18832. [2022-01-18 04:02:17,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18832 states, 18831 states have (on average 4.057883277574213) internal successors, (76414), 18831 states have internal predecessors, (76414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18832 states to 18832 states and 76414 transitions. [2022-01-18 04:02:17,813 INFO L78 Accepts]: Start accepts. Automaton has 18832 states and 76414 transitions. Word has length 30 [2022-01-18 04:02:17,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:17,813 INFO L470 AbstractCegarLoop]: Abstraction has 18832 states and 76414 transitions. [2022-01-18 04:02:17,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:17,813 INFO L276 IsEmpty]: Start isEmpty. Operand 18832 states and 76414 transitions. [2022-01-18 04:02:17,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 04:02:17,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:17,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:17,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 04:02:18,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:18,151 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:18,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1045458162, now seen corresponding path program 13 times [2022-01-18 04:02:18,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:18,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810744388] [2022-01-18 04:02:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:18,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:18,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:18,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810744388] [2022-01-18 04:02:18,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810744388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:18,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188429156] [2022-01-18 04:02:18,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:02:18,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:18,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:18,224 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) [2022-01-18 04:02:18,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 04:02:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:18,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 04:02:18,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:18,461 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 15 treesize of output 11 [2022-01-18 04:02:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:18,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:18,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:18,543 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:02:18,698 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:18,698 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 04:02:18,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:18,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 04:02:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:18,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188429156] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:18,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:18,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2022-01-18 04:02:18,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616974820] [2022-01-18 04:02:18,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:18,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:02:18,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:18,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:02:18,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:02:18,767 INFO L87 Difference]: Start difference. First operand 18832 states and 76414 transitions. Second operand has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:20,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:20,696 INFO L93 Difference]: Finished difference Result 27899 states and 109410 transitions. [2022-01-18 04:02:20,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 04:02:20,697 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 04:02:20,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:20,849 INFO L225 Difference]: With dead ends: 27899 [2022-01-18 04:02:20,849 INFO L226 Difference]: Without dead ends: 27038 [2022-01-18 04:02:20,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=384, Invalid=2478, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 04:02:20,850 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 516 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 3079 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 3125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:20,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 891 Invalid, 3125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3079 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 04:02:20,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27038 states. [2022-01-18 04:02:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27038 to 19335. [2022-01-18 04:02:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19335 states, 19334 states have (on average 4.045463949518982) internal successors, (78215), 19334 states have internal predecessors, (78215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:21,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19335 states to 19335 states and 78215 transitions. [2022-01-18 04:02:21,470 INFO L78 Accepts]: Start accepts. Automaton has 19335 states and 78215 transitions. Word has length 30 [2022-01-18 04:02:21,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:21,470 INFO L470 AbstractCegarLoop]: Abstraction has 19335 states and 78215 transitions. [2022-01-18 04:02:21,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 19335 states and 78215 transitions. [2022-01-18 04:02:21,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 04:02:21,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:21,503 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:21,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 04:02:21,703 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,SelfDestructingSolverStorable41 [2022-01-18 04:02:21,703 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:21,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:21,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1984561458, now seen corresponding path program 1 times [2022-01-18 04:02:21,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:21,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482301778] [2022-01-18 04:02:21,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:21,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:21,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:21,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482301778] [2022-01-18 04:02:21,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482301778] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:21,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818858106] [2022-01-18 04:02:21,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:21,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:21,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:21,788 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) [2022-01-18 04:02:21,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 04:02:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:21,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 04:02:21,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:22,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:22,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:22,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:02:22,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:22,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-01-18 04:02:22,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:22,525 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 32 treesize of output 34 [2022-01-18 04:02:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:22,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818858106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:22,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:22,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2022-01-18 04:02:22,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876098118] [2022-01-18 04:02:22,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:22,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 04:02:22,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:22,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 04:02:22,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:02:22,633 INFO L87 Difference]: Start difference. First operand 19335 states and 78215 transitions. Second operand has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 23 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:25,838 INFO L93 Difference]: Finished difference Result 30338 states and 117072 transitions. [2022-01-18 04:02:25,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 04:02:25,838 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 23 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 04:02:25,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:25,925 INFO L225 Difference]: With dead ends: 30338 [2022-01-18 04:02:25,925 INFO L226 Difference]: Without dead ends: 28916 [2022-01-18 04:02:25,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=820, Invalid=4730, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 04:02:25,927 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 604 mSDsluCounter, 1730 mSDsCounter, 0 mSdLazyCounter, 3643 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 3719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 3643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:25,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 1121 Invalid, 3719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 3643 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 04:02:25,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28916 states. [2022-01-18 04:02:26,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28916 to 19265. [2022-01-18 04:02:26,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19265 states, 19264 states have (on average 4.046875) internal successors, (77959), 19264 states have internal predecessors, (77959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:26,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19265 states to 19265 states and 77959 transitions. [2022-01-18 04:02:26,517 INFO L78 Accepts]: Start accepts. Automaton has 19265 states and 77959 transitions. Word has length 30 [2022-01-18 04:02:26,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:26,517 INFO L470 AbstractCegarLoop]: Abstraction has 19265 states and 77959 transitions. [2022-01-18 04:02:26,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 23 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:26,518 INFO L276 IsEmpty]: Start isEmpty. Operand 19265 states and 77959 transitions. [2022-01-18 04:02:26,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 04:02:26,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:26,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:26,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 04:02:26,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:26,752 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:26,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:26,752 INFO L85 PathProgramCache]: Analyzing trace with hash 918381320, now seen corresponding path program 14 times [2022-01-18 04:02:26,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:26,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286174123] [2022-01-18 04:02:26,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:26,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:26,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:26,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286174123] [2022-01-18 04:02:26,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286174123] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:26,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597015941] [2022-01-18 04:02:26,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:02:26,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:26,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:26,823 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) [2022-01-18 04:02:26,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 04:02:26,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:02:26,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:02:26,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 04:02:26,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:26,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:27,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597015941] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:27,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:27,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 20 [2022-01-18 04:02:27,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424028465] [2022-01-18 04:02:27,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:27,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:02:27,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:27,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:02:27,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:02:27,209 INFO L87 Difference]: Start difference. First operand 19265 states and 77959 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:29,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:29,412 INFO L93 Difference]: Finished difference Result 44625 states and 170938 transitions. [2022-01-18 04:02:29,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 04:02:29,412 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 04:02:29,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:29,548 INFO L225 Difference]: With dead ends: 44625 [2022-01-18 04:02:29,548 INFO L226 Difference]: Without dead ends: 42997 [2022-01-18 04:02:29,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=886, Invalid=3670, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 04:02:29,550 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 835 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 2482 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:29,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 878 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2482 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 04:02:29,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42997 states. [2022-01-18 04:02:30,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42997 to 24301. [2022-01-18 04:02:30,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24301 states, 24300 states have (on average 4.098971193415638) internal successors, (99605), 24300 states have internal predecessors, (99605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24301 states to 24301 states and 99605 transitions. [2022-01-18 04:02:30,558 INFO L78 Accepts]: Start accepts. Automaton has 24301 states and 99605 transitions. Word has length 30 [2022-01-18 04:02:30,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:30,558 INFO L470 AbstractCegarLoop]: Abstraction has 24301 states and 99605 transitions. [2022-01-18 04:02:30,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:30,558 INFO L276 IsEmpty]: Start isEmpty. Operand 24301 states and 99605 transitions. [2022-01-18 04:02:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 04:02:30,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:30,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:30,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 04:02:30,799 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,SelfDestructingSolverStorable43 [2022-01-18 04:02:30,799 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:30,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:30,800 INFO L85 PathProgramCache]: Analyzing trace with hash 296500910, now seen corresponding path program 15 times [2022-01-18 04:02:30,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:30,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586069223] [2022-01-18 04:02:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:30,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:30,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:30,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586069223] [2022-01-18 04:02:30,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586069223] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:30,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869413045] [2022-01-18 04:02:30,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:02:30,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:30,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:30,882 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) [2022-01-18 04:02:30,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 04:02:30,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:02:30,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:02:30,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 04:02:30,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:31,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:31,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869413045] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:31,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:31,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-18 04:02:31,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439539041] [2022-01-18 04:02:31,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:31,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:02:31,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:31,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:02:31,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:02:31,217 INFO L87 Difference]: Start difference. First operand 24301 states and 99605 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:32,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:32,212 INFO L93 Difference]: Finished difference Result 36554 states and 144065 transitions. [2022-01-18 04:02:32,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:02:32,212 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 04:02:32,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:32,335 INFO L225 Difference]: With dead ends: 36554 [2022-01-18 04:02:32,335 INFO L226 Difference]: Without dead ends: 35826 [2022-01-18 04:02:32,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:02:32,336 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 508 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:32,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 383 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:02:32,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35826 states. [2022-01-18 04:02:33,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35826 to 24880. [2022-01-18 04:02:33,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24880 states, 24879 states have (on average 4.113107440009647) internal successors, (102330), 24879 states have internal predecessors, (102330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:33,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24880 states to 24880 states and 102330 transitions. [2022-01-18 04:02:33,142 INFO L78 Accepts]: Start accepts. Automaton has 24880 states and 102330 transitions. Word has length 30 [2022-01-18 04:02:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:33,143 INFO L470 AbstractCegarLoop]: Abstraction has 24880 states and 102330 transitions. [2022-01-18 04:02:33,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 24880 states and 102330 transitions. [2022-01-18 04:02:33,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 04:02:33,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:33,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:33,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 04:02:33,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:33,386 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:33,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:33,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1426258168, now seen corresponding path program 16 times [2022-01-18 04:02:33,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:33,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571077598] [2022-01-18 04:02:33,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:33,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:33,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:33,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571077598] [2022-01-18 04:02:33,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571077598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:33,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090049488] [2022-01-18 04:02:33,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:02:33,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:33,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:33,460 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) [2022-01-18 04:02:33,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 04:02:33,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:02:33,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:02:33,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 04:02:33,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:33,713 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 15 treesize of output 11 [2022-01-18 04:02:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:33,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:33,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:33,817 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:02:33,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:33,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:02:33,923 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:33,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 04:02:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 04:02:34,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090049488] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:34,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:34,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2022-01-18 04:02:34,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225980517] [2022-01-18 04:02:34,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:34,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:02:34,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:34,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:02:34,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:02:34,064 INFO L87 Difference]: Start difference. First operand 24880 states and 102330 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 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) [2022-01-18 04:02:37,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:37,938 INFO L93 Difference]: Finished difference Result 55484 states and 210244 transitions. [2022-01-18 04:02:37,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-18 04:02:37,938 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 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) Word has length 30 [2022-01-18 04:02:37,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:38,119 INFO L225 Difference]: With dead ends: 55484 [2022-01-18 04:02:38,119 INFO L226 Difference]: Without dead ends: 51916 [2022-01-18 04:02:38,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4181 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1415, Invalid=11017, Unknown=0, NotChecked=0, Total=12432 [2022-01-18 04:02:38,122 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1150 mSDsluCounter, 1848 mSDsCounter, 0 mSdLazyCounter, 3843 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 3944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:38,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 1346 Invalid, 3944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3843 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 04:02:38,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51916 states. [2022-01-18 04:02:39,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51916 to 26647. [2022-01-18 04:02:39,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26647 states, 26646 states have (on average 4.111611498911657) internal successors, (109558), 26646 states have internal predecessors, (109558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:39,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26647 states to 26647 states and 109558 transitions. [2022-01-18 04:02:39,260 INFO L78 Accepts]: Start accepts. Automaton has 26647 states and 109558 transitions. Word has length 30 [2022-01-18 04:02:39,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:39,260 INFO L470 AbstractCegarLoop]: Abstraction has 26647 states and 109558 transitions. [2022-01-18 04:02:39,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 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) [2022-01-18 04:02:39,260 INFO L276 IsEmpty]: Start isEmpty. Operand 26647 states and 109558 transitions. [2022-01-18 04:02:39,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 04:02:39,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:39,313 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:39,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-18 04:02:39,513 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,SelfDestructingSolverStorable45 [2022-01-18 04:02:39,513 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:39,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:39,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1212441790, now seen corresponding path program 17 times [2022-01-18 04:02:39,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:39,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123946314] [2022-01-18 04:02:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:39,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:39,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:39,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123946314] [2022-01-18 04:02:39,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123946314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:39,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144156004] [2022-01-18 04:02:39,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:02:39,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:39,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:39,570 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) [2022-01-18 04:02:39,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 04:02:39,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 04:02:39,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:02:39,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 04:02:39,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:39,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:39,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144156004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:39,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:39,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-01-18 04:02:39,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914050248] [2022-01-18 04:02:39,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:39,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:02:39,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:39,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:02:39,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:02:39,964 INFO L87 Difference]: Start difference. First operand 26647 states and 109558 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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) [2022-01-18 04:02:41,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:41,273 INFO L93 Difference]: Finished difference Result 69453 states and 279353 transitions. [2022-01-18 04:02:41,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 04:02:41,273 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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) Word has length 30 [2022-01-18 04:02:41,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:41,561 INFO L225 Difference]: With dead ends: 69453 [2022-01-18 04:02:41,561 INFO L226 Difference]: Without dead ends: 68598 [2022-01-18 04:02:41,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=984, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 04:02:41,562 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 559 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:41,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 433 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:02:41,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68598 states. [2022-01-18 04:02:42,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68598 to 42417. [2022-01-18 04:02:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42417 states, 42416 states have (on average 4.229818936250472) internal successors, (179412), 42416 states have internal predecessors, (179412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:43,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42417 states to 42417 states and 179412 transitions. [2022-01-18 04:02:43,132 INFO L78 Accepts]: Start accepts. Automaton has 42417 states and 179412 transitions. Word has length 30 [2022-01-18 04:02:43,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:43,132 INFO L470 AbstractCegarLoop]: Abstraction has 42417 states and 179412 transitions. [2022-01-18 04:02:43,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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) [2022-01-18 04:02:43,133 INFO L276 IsEmpty]: Start isEmpty. Operand 42417 states and 179412 transitions. [2022-01-18 04:02:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 04:02:43,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:43,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:43,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 04:02:43,403 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,SelfDestructingSolverStorable46 [2022-01-18 04:02:43,403 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:43,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:43,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1300393330, now seen corresponding path program 1 times [2022-01-18 04:02:43,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:43,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197106041] [2022-01-18 04:02:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:43,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:43,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:43,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197106041] [2022-01-18 04:02:43,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197106041] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:43,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35835195] [2022-01-18 04:02:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:43,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:43,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:43,472 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) [2022-01-18 04:02:43,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 04:02:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:43,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 04:02:43,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:44,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:44,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:44,128 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 04:02:44,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:44,217 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 04:02:44,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:02:44,221 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 04:02:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 04:02:44,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35835195] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:44,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:44,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2022-01-18 04:02:44,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069684201] [2022-01-18 04:02:44,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:44,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:02:44,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:44,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:02:44,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:02:44,363 INFO L87 Difference]: Start difference. First operand 42417 states and 179412 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 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) [2022-01-18 04:02:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:47,934 INFO L93 Difference]: Finished difference Result 58914 states and 236481 transitions. [2022-01-18 04:02:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-18 04:02:47,934 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 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) Word has length 30 [2022-01-18 04:02:47,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:48,134 INFO L225 Difference]: With dead ends: 58914 [2022-01-18 04:02:48,134 INFO L226 Difference]: Without dead ends: 56127 [2022-01-18 04:02:48,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1299, Invalid=8403, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 04:02:48,136 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1357 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 2747 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 2844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:48,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1357 Valid, 912 Invalid, 2844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2747 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 04:02:48,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56127 states. [2022-01-18 04:02:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56127 to 43337. [2022-01-18 04:02:49,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43337 states, 43336 states have (on average 4.222101716817426) internal successors, (182969), 43336 states have internal predecessors, (182969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43337 states to 43337 states and 182969 transitions. [2022-01-18 04:02:49,661 INFO L78 Accepts]: Start accepts. Automaton has 43337 states and 182969 transitions. Word has length 30 [2022-01-18 04:02:49,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:49,661 INFO L470 AbstractCegarLoop]: Abstraction has 43337 states and 182969 transitions. [2022-01-18 04:02:49,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 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) [2022-01-18 04:02:49,661 INFO L276 IsEmpty]: Start isEmpty. Operand 43337 states and 182969 transitions. [2022-01-18 04:02:49,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 04:02:49,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:49,725 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:49,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 04:02:49,926 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,SelfDestructingSolverStorable47 [2022-01-18 04:02:49,926 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:49,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1543737064, now seen corresponding path program 18 times [2022-01-18 04:02:49,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:49,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483388942] [2022-01-18 04:02:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:49,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:49,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:49,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483388942] [2022-01-18 04:02:49,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483388942] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:49,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091482706] [2022-01-18 04:02:49,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:02:49,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:49,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:49,981 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) [2022-01-18 04:02:49,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 04:02:50,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 04:02:50,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:02:50,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 04:02:50,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:50,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:50,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091482706] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:50,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:50,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-01-18 04:02:50,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296484493] [2022-01-18 04:02:50,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:50,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:02:50,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:50,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:02:50,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:02:50,315 INFO L87 Difference]: Start difference. First operand 43337 states and 182969 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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) [2022-01-18 04:02:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:52,001 INFO L93 Difference]: Finished difference Result 69905 states and 281636 transitions. [2022-01-18 04:02:52,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 04:02:52,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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) Word has length 30 [2022-01-18 04:02:52,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:52,274 INFO L225 Difference]: With dead ends: 69905 [2022-01-18 04:02:52,274 INFO L226 Difference]: Without dead ends: 68764 [2022-01-18 04:02:52,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=1571, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 04:02:52,274 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 509 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:52,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 541 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 04:02:52,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68764 states. [2022-01-18 04:02:53,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68764 to 42944. [2022-01-18 04:02:53,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42944 states, 42943 states have (on average 4.21998928812612) internal successors, (181219), 42943 states have internal predecessors, (181219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42944 states to 42944 states and 181219 transitions. [2022-01-18 04:02:54,091 INFO L78 Accepts]: Start accepts. Automaton has 42944 states and 181219 transitions. Word has length 30 [2022-01-18 04:02:54,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:54,091 INFO L470 AbstractCegarLoop]: Abstraction has 42944 states and 181219 transitions. [2022-01-18 04:02:54,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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) [2022-01-18 04:02:54,092 INFO L276 IsEmpty]: Start isEmpty. Operand 42944 states and 181219 transitions. [2022-01-18 04:02:54,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 04:02:54,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:54,170 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:54,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 04:02:54,371 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,SelfDestructingSolverStorable48 [2022-01-18 04:02:54,371 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:54,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:54,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1456536937, now seen corresponding path program 19 times [2022-01-18 04:02:54,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:54,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790592239] [2022-01-18 04:02:54,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:54,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:54,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:54,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790592239] [2022-01-18 04:02:54,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790592239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:54,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694890069] [2022-01-18 04:02:54,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:02:54,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:54,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:54,431 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) [2022-01-18 04:02:54,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 04:02:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:54,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:02:54,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:54,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:54,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-18 04:02:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:02:54,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694890069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:54,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:54,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-01-18 04:02:54,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110337296] [2022-01-18 04:02:54,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:54,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 04:02:54,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:54,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 04:02:54,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 04:02:54,739 INFO L87 Difference]: Start difference. First operand 42944 states and 181219 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:55,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:02:55,764 INFO L93 Difference]: Finished difference Result 70324 states and 288660 transitions. [2022-01-18 04:02:55,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 04:02:55,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 04:02:55,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:02:56,008 INFO L225 Difference]: With dead ends: 70324 [2022-01-18 04:02:56,008 INFO L226 Difference]: Without dead ends: 65874 [2022-01-18 04:02:56,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:02:56,009 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 233 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:02:56,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 404 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:02:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65874 states. [2022-01-18 04:02:57,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65874 to 54754. [2022-01-18 04:02:57,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54754 states, 54753 states have (on average 4.267163443099008) internal successors, (233640), 54753 states have internal predecessors, (233640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:57,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54754 states to 54754 states and 233640 transitions. [2022-01-18 04:02:57,939 INFO L78 Accepts]: Start accepts. Automaton has 54754 states and 233640 transitions. Word has length 30 [2022-01-18 04:02:57,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:02:57,940 INFO L470 AbstractCegarLoop]: Abstraction has 54754 states and 233640 transitions. [2022-01-18 04:02:57,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:02:57,940 INFO L276 IsEmpty]: Start isEmpty. Operand 54754 states and 233640 transitions. [2022-01-18 04:02:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 04:02:58,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:02:58,027 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:02:58,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 04:02:58,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 04:02:58,228 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:02:58,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:02:58,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1269123960, now seen corresponding path program 20 times [2022-01-18 04:02:58,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:02:58,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794919192] [2022-01-18 04:02:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:02:58,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:02:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:02:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:58,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:02:58,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794919192] [2022-01-18 04:02:58,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794919192] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:02:58,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766439767] [2022-01-18 04:02:58,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:02:58,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:02:58,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:02:58,311 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) [2022-01-18 04:02:58,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 04:02:58,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:02:58,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:02:58,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 04:02:58,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:02:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:58,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:02:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:02:59,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766439767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:02:59,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:02:59,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 20 [2022-01-18 04:02:59,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601974034] [2022-01-18 04:02:59,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:02:59,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:02:59,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:02:59,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:02:59,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:02:59,294 INFO L87 Difference]: Start difference. First operand 54754 states and 233640 transitions. Second operand has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:03,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:03:03,578 INFO L93 Difference]: Finished difference Result 184005 states and 756361 transitions. [2022-01-18 04:03:03,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 04:03:03,580 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 04:03:03,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:03:04,961 INFO L225 Difference]: With dead ends: 184005 [2022-01-18 04:03:04,962 INFO L226 Difference]: Without dead ends: 181824 [2022-01-18 04:03:04,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2022 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1272, Invalid=5534, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 04:03:04,962 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 685 mSDsluCounter, 2118 mSDsCounter, 0 mSdLazyCounter, 4154 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 4247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:03:04,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1394 Invalid, 4247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4154 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 04:03:05,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181824 states. [2022-01-18 04:03:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181824 to 106610. [2022-01-18 04:03:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106610 states, 106609 states have (on average 4.35624572034256) internal successors, (464415), 106609 states have internal predecessors, (464415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106610 states to 106610 states and 464415 transitions. [2022-01-18 04:03:10,377 INFO L78 Accepts]: Start accepts. Automaton has 106610 states and 464415 transitions. Word has length 30 [2022-01-18 04:03:10,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:03:10,377 INFO L470 AbstractCegarLoop]: Abstraction has 106610 states and 464415 transitions. [2022-01-18 04:03:10,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:10,377 INFO L276 IsEmpty]: Start isEmpty. Operand 106610 states and 464415 transitions. [2022-01-18 04:03:10,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 04:03:10,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:03:10,518 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:03:10,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 04:03:10,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:03:10,719 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:03:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:03:10,719 INFO L85 PathProgramCache]: Analyzing trace with hash -222328670, now seen corresponding path program 21 times [2022-01-18 04:03:10,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:03:10,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564128907] [2022-01-18 04:03:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:03:10,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:03:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:03:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:10,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:03:10,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564128907] [2022-01-18 04:03:10,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564128907] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:03:10,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713621050] [2022-01-18 04:03:10,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:03:10,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:03:10,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:03:10,791 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) [2022-01-18 04:03:10,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 04:03:10,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:03:10,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:03:10,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 04:03:10,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:03:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 04:03:10,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:03:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 04:03:11,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713621050] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:03:11,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:03:11,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-18 04:03:11,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873699587] [2022-01-18 04:03:11,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:03:11,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:03:11,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:03:11,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:03:11,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:03:11,032 INFO L87 Difference]: Start difference. First operand 106610 states and 464415 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:03:13,663 INFO L93 Difference]: Finished difference Result 150166 states and 638300 transitions. [2022-01-18 04:03:13,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:03:13,663 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 04:03:13,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:03:14,402 INFO L225 Difference]: With dead ends: 150166 [2022-01-18 04:03:14,403 INFO L226 Difference]: Without dead ends: 149066 [2022-01-18 04:03:14,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 04:03:14,403 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 326 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:03:14,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 423 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 04:03:14,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149066 states. [2022-01-18 04:03:17,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149066 to 48965. [2022-01-18 04:03:17,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48965 states, 48964 states have (on average 4.276795196470877) internal successors, (209409), 48964 states have internal predecessors, (209409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48965 states to 48965 states and 209409 transitions. [2022-01-18 04:03:17,390 INFO L78 Accepts]: Start accepts. Automaton has 48965 states and 209409 transitions. Word has length 30 [2022-01-18 04:03:17,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:03:17,390 INFO L470 AbstractCegarLoop]: Abstraction has 48965 states and 209409 transitions. [2022-01-18 04:03:17,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 48965 states and 209409 transitions. [2022-01-18 04:03:17,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:03:17,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:03:17,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:03:17,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 04:03:17,676 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,SelfDestructingSolverStorable51 [2022-01-18 04:03:17,676 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:03:17,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:03:17,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1542296040, now seen corresponding path program 22 times [2022-01-18 04:03:17,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:03:17,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192183978] [2022-01-18 04:03:17,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:03:17,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:03:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:03:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:17,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:03:17,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192183978] [2022-01-18 04:03:17,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192183978] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:03:17,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918564838] [2022-01-18 04:03:17,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:03:17,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:03:17,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:03:17,841 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) [2022-01-18 04:03:17,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 04:03:17,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:03:17,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:03:17,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 04:03:17,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:03:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 04:03:18,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:03:18,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-18 04:03:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 04:03:18,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918564838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:03:18,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:03:18,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2022-01-18 04:03:18,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101009196] [2022-01-18 04:03:18,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:03:18,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:03:18,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:03:18,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:03:18,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:03:18,431 INFO L87 Difference]: Start difference. First operand 48965 states and 209409 transitions. Second operand has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 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) [2022-01-18 04:03:20,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:03:20,953 INFO L93 Difference]: Finished difference Result 78790 states and 327366 transitions. [2022-01-18 04:03:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 04:03:20,953 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 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) Word has length 33 [2022-01-18 04:03:20,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:03:21,253 INFO L225 Difference]: With dead ends: 78790 [2022-01-18 04:03:21,253 INFO L226 Difference]: Without dead ends: 76956 [2022-01-18 04:03:21,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 04:03:21,253 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 558 mSDsluCounter, 1596 mSDsCounter, 0 mSdLazyCounter, 3014 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 3052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:03:21,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 1116 Invalid, 3052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3014 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 04:03:21,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76956 states. [2022-01-18 04:03:23,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76956 to 51758. [2022-01-18 04:03:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51758 states, 51757 states have (on average 4.271248333558746) internal successors, (221067), 51757 states have internal predecessors, (221067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:23,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51758 states to 51758 states and 221067 transitions. [2022-01-18 04:03:23,452 INFO L78 Accepts]: Start accepts. Automaton has 51758 states and 221067 transitions. Word has length 33 [2022-01-18 04:03:23,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:03:23,452 INFO L470 AbstractCegarLoop]: Abstraction has 51758 states and 221067 transitions. [2022-01-18 04:03:23,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 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) [2022-01-18 04:03:23,452 INFO L276 IsEmpty]: Start isEmpty. Operand 51758 states and 221067 transitions. [2022-01-18 04:03:23,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:03:23,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:03:23,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:03:23,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 04:03:23,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:03:23,752 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:03:23,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:03:23,752 INFO L85 PathProgramCache]: Analyzing trace with hash -626163208, now seen corresponding path program 1 times [2022-01-18 04:03:23,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:03:23,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891625360] [2022-01-18 04:03:23,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:03:23,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:03:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:03:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:23,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:03:23,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891625360] [2022-01-18 04:03:23,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891625360] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:03:23,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473560930] [2022-01-18 04:03:23,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:03:23,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:03:23,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:03:23,889 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) [2022-01-18 04:03:23,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 04:03:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:03:23,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:03:23,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:03:24,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:03:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:24,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:03:24,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:24,122 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 20 treesize of output 24 [2022-01-18 04:03:24,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:24,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 04:03:24,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:24,195 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 28 treesize of output 32 [2022-01-18 04:03:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:24,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473560930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:03:24,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:03:24,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-01-18 04:03:24,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554488308] [2022-01-18 04:03:24,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:03:24,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:03:24,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:03:24,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:03:24,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:03:24,258 INFO L87 Difference]: Start difference. First operand 51758 states and 221067 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:25,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:03:25,424 INFO L93 Difference]: Finished difference Result 55232 states and 233469 transitions. [2022-01-18 04:03:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:03:25,424 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:03:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:03:25,683 INFO L225 Difference]: With dead ends: 55232 [2022-01-18 04:03:25,684 INFO L226 Difference]: Without dead ends: 55056 [2022-01-18 04:03:25,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:03:25,684 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 172 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:03:25,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 403 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 04:03:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55056 states. [2022-01-18 04:03:26,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55056 to 52745. [2022-01-18 04:03:26,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52745 states, 52744 states have (on average 4.260977551949037) internal successors, (224741), 52744 states have internal predecessors, (224741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52745 states to 52745 states and 224741 transitions. [2022-01-18 04:03:27,195 INFO L78 Accepts]: Start accepts. Automaton has 52745 states and 224741 transitions. Word has length 33 [2022-01-18 04:03:27,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:03:27,196 INFO L470 AbstractCegarLoop]: Abstraction has 52745 states and 224741 transitions. [2022-01-18 04:03:27,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:27,196 INFO L276 IsEmpty]: Start isEmpty. Operand 52745 states and 224741 transitions. [2022-01-18 04:03:27,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:03:27,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:03:27,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:03:27,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 04:03:27,483 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,SelfDestructingSolverStorable53 [2022-01-18 04:03:27,483 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:03:27,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:03:27,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2075038142, now seen corresponding path program 1 times [2022-01-18 04:03:27,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:03:27,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388785515] [2022-01-18 04:03:27,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:03:27,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:03:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:03:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:27,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:03:27,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388785515] [2022-01-18 04:03:27,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388785515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:03:27,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844690331] [2022-01-18 04:03:27,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:03:27,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:03:27,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:03:27,633 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) [2022-01-18 04:03:27,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 04:03:27,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:03:27,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 04:03:27,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:03:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:28,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:03:28,414 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:28,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 04:03:28,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:28,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 04:03:28,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:28,688 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 24 treesize of output 28 [2022-01-18 04:03:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:28,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844690331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:03:28,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:03:28,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-18 04:03:28,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713971341] [2022-01-18 04:03:28,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:03:28,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 04:03:28,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:03:28,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 04:03:28,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:03:28,779 INFO L87 Difference]: Start difference. First operand 52745 states and 224741 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:30,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:03:30,022 INFO L93 Difference]: Finished difference Result 55223 states and 233029 transitions. [2022-01-18 04:03:30,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 04:03:30,022 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:03:30,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:03:30,214 INFO L225 Difference]: With dead ends: 55223 [2022-01-18 04:03:30,214 INFO L226 Difference]: Without dead ends: 54857 [2022-01-18 04:03:30,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:03:30,214 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 190 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:03:30,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 483 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 665 Invalid, 0 Unknown, 234 Unchecked, 0.3s Time] [2022-01-18 04:03:30,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54857 states. [2022-01-18 04:03:31,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54857 to 53763. [2022-01-18 04:03:31,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53763 states, 53762 states have (on average 4.249544287786913) internal successors, (228464), 53762 states have internal predecessors, (228464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:31,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53763 states to 53763 states and 228464 transitions. [2022-01-18 04:03:31,880 INFO L78 Accepts]: Start accepts. Automaton has 53763 states and 228464 transitions. Word has length 33 [2022-01-18 04:03:31,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:03:31,880 INFO L470 AbstractCegarLoop]: Abstraction has 53763 states and 228464 transitions. [2022-01-18 04:03:31,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 53763 states and 228464 transitions. [2022-01-18 04:03:31,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:03:31,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:03:31,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:03:31,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 04:03:32,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:03:32,171 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:03:32,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:03:32,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1347145400, now seen corresponding path program 2 times [2022-01-18 04:03:32,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:03:32,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594345474] [2022-01-18 04:03:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:03:32,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:03:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:03:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:32,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:03:32,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594345474] [2022-01-18 04:03:32,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594345474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:03:32,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634677127] [2022-01-18 04:03:32,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:03:32,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:03:32,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:03:32,292 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) [2022-01-18 04:03:32,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 04:03:32,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:03:32,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:03:32,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:03:32,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:03:32,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:03:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:32,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:03:32,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:32,563 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 04:03:33,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:33,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 04:03:33,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:33,041 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 04:03:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:33,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634677127] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:03:33,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:03:33,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-01-18 04:03:33,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519013079] [2022-01-18 04:03:33,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:03:33,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:03:33,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:03:33,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:03:33,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:03:33,098 INFO L87 Difference]: Start difference. First operand 53763 states and 228464 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:34,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:03:34,159 INFO L93 Difference]: Finished difference Result 59813 states and 249425 transitions. [2022-01-18 04:03:34,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:03:34,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:03:34,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:03:34,362 INFO L225 Difference]: With dead ends: 59813 [2022-01-18 04:03:34,362 INFO L226 Difference]: Without dead ends: 59755 [2022-01-18 04:03:34,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:03:34,363 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 238 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:03:34,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 379 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:03:34,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59755 states. [2022-01-18 04:03:35,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59755 to 54052. [2022-01-18 04:03:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54052 states, 54051 states have (on average 4.245693881704316) internal successors, (229484), 54051 states have internal predecessors, (229484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:36,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54052 states to 54052 states and 229484 transitions. [2022-01-18 04:03:36,402 INFO L78 Accepts]: Start accepts. Automaton has 54052 states and 229484 transitions. Word has length 33 [2022-01-18 04:03:36,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:03:36,403 INFO L470 AbstractCegarLoop]: Abstraction has 54052 states and 229484 transitions. [2022-01-18 04:03:36,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:36,403 INFO L276 IsEmpty]: Start isEmpty. Operand 54052 states and 229484 transitions. [2022-01-18 04:03:36,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:03:36,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:03:36,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:03:36,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 04:03:36,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:03:36,721 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:03:36,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:03:36,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1278628516, now seen corresponding path program 2 times [2022-01-18 04:03:36,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:03:36,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38801849] [2022-01-18 04:03:36,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:03:36,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:03:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:03:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:36,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:03:36,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38801849] [2022-01-18 04:03:36,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38801849] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:03:36,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976699497] [2022-01-18 04:03:36,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:03:36,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:03:36,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:03:36,853 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) [2022-01-18 04:03:36,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 04:03:36,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:03:36,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:03:36,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 04:03:36,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:03:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:37,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:03:37,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:37,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 04:03:37,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:37,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 04:03:37,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:37,752 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 24 treesize of output 28 [2022-01-18 04:03:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:37,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976699497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:03:37,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:03:37,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-18 04:03:37,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077613454] [2022-01-18 04:03:37,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:03:37,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 04:03:37,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:03:37,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 04:03:37,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:03:37,821 INFO L87 Difference]: Start difference. First operand 54052 states and 229484 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:03:38,566 INFO L93 Difference]: Finished difference Result 55894 states and 235531 transitions. [2022-01-18 04:03:38,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:03:38,567 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:03:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:03:38,757 INFO L225 Difference]: With dead ends: 55894 [2022-01-18 04:03:38,757 INFO L226 Difference]: Without dead ends: 54769 [2022-01-18 04:03:38,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:03:38,758 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 204 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:03:38,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 497 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 938 Invalid, 0 Unknown, 697 Unchecked, 0.3s Time] [2022-01-18 04:03:38,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54769 states. [2022-01-18 04:03:40,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54769 to 53224. [2022-01-18 04:03:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53224 states, 53223 states have (on average 4.254457659282641) internal successors, (226435), 53223 states have internal predecessors, (226435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53224 states to 53224 states and 226435 transitions. [2022-01-18 04:03:40,669 INFO L78 Accepts]: Start accepts. Automaton has 53224 states and 226435 transitions. Word has length 33 [2022-01-18 04:03:40,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:03:40,670 INFO L470 AbstractCegarLoop]: Abstraction has 53224 states and 226435 transitions. [2022-01-18 04:03:40,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:40,670 INFO L276 IsEmpty]: Start isEmpty. Operand 53224 states and 226435 transitions. [2022-01-18 04:03:40,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:03:40,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:03:40,760 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:03:40,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 04:03:40,960 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,SelfDestructingSolverStorable56 [2022-01-18 04:03:40,961 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:03:40,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:03:40,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1253608886, now seen corresponding path program 3 times [2022-01-18 04:03:40,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:03:40,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285328339] [2022-01-18 04:03:40,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:03:40,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:03:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:03:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:41,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:03:41,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285328339] [2022-01-18 04:03:41,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285328339] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:03:41,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184613287] [2022-01-18 04:03:41,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:03:41,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:03:41,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:03:41,104 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) [2022-01-18 04:03:41,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 04:03:41,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 04:03:41,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:03:41,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:03:41,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:03:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:41,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:03:42,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:42,033 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 37 treesize of output 39 [2022-01-18 04:03:42,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:42,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 71 [2022-01-18 04:03:42,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:42,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2022-01-18 04:03:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:43,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184613287] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:03:43,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:03:43,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 31 [2022-01-18 04:03:43,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607409581] [2022-01-18 04:03:43,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:03:43,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 04:03:43,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:03:43,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 04:03:43,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:03:43,264 INFO L87 Difference]: Start difference. First operand 53224 states and 226435 transitions. Second operand has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:47,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:03:47,186 INFO L93 Difference]: Finished difference Result 58827 states and 243926 transitions. [2022-01-18 04:03:47,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 04:03:47,187 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:03:47,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:03:47,387 INFO L225 Difference]: With dead ends: 58827 [2022-01-18 04:03:47,387 INFO L226 Difference]: Without dead ends: 57760 [2022-01-18 04:03:47,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1051, Invalid=5429, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 04:03:47,388 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1069 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 3162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 724 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:03:47,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1069 Valid, 769 Invalid, 3162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2353 Invalid, 0 Unknown, 724 Unchecked, 1.0s Time] [2022-01-18 04:03:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57760 states. [2022-01-18 04:03:48,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57760 to 53698. [2022-01-18 04:03:49,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53698 states, 53697 states have (on average 4.24898970147308) internal successors, (228158), 53697 states have internal predecessors, (228158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53698 states to 53698 states and 228158 transitions. [2022-01-18 04:03:49,241 INFO L78 Accepts]: Start accepts. Automaton has 53698 states and 228158 transitions. Word has length 33 [2022-01-18 04:03:49,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:03:49,241 INFO L470 AbstractCegarLoop]: Abstraction has 53698 states and 228158 transitions. [2022-01-18 04:03:49,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:49,241 INFO L276 IsEmpty]: Start isEmpty. Operand 53698 states and 228158 transitions. [2022-01-18 04:03:49,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:03:49,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:03:49,332 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:03:49,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 04:03:49,533 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,SelfDestructingSolverStorable57 [2022-01-18 04:03:49,533 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:03:49,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:03:49,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1730307346, now seen corresponding path program 4 times [2022-01-18 04:03:49,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:03:49,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089802041] [2022-01-18 04:03:49,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:03:49,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:03:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:03:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:49,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:03:49,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089802041] [2022-01-18 04:03:49,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089802041] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:03:49,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120794253] [2022-01-18 04:03:49,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:03:49,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:03:49,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:03:49,639 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) [2022-01-18 04:03:49,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 04:03:49,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:03:49,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:03:49,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 04:03:49,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:03:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:49,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:03:50,055 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:50,055 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 37 treesize of output 39 [2022-01-18 04:03:50,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:50,242 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 30 treesize of output 34 [2022-01-18 04:03:50,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:50,261 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 04:03:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:50,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120794253] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:03:50,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:03:50,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-18 04:03:50,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370665610] [2022-01-18 04:03:50,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:03:50,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 04:03:50,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:03:50,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 04:03:50,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:03:50,306 INFO L87 Difference]: Start difference. First operand 53698 states and 228158 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:52,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:03:52,241 INFO L93 Difference]: Finished difference Result 55027 states and 232304 transitions. [2022-01-18 04:03:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:03:52,241 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:03:52,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:03:52,446 INFO L225 Difference]: With dead ends: 55027 [2022-01-18 04:03:52,446 INFO L226 Difference]: Without dead ends: 54287 [2022-01-18 04:03:52,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 04:03:52,447 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 406 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 04:03:52,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 547 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1944 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 04:03:52,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54287 states. [2022-01-18 04:03:53,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54287 to 53507. [2022-01-18 04:03:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53507 states, 53506 states have (on average 4.2483459798901055) internal successors, (227312), 53506 states have internal predecessors, (227312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:53,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53507 states to 53507 states and 227312 transitions. [2022-01-18 04:03:53,923 INFO L78 Accepts]: Start accepts. Automaton has 53507 states and 227312 transitions. Word has length 33 [2022-01-18 04:03:53,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:03:53,923 INFO L470 AbstractCegarLoop]: Abstraction has 53507 states and 227312 transitions. [2022-01-18 04:03:53,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:03:53,923 INFO L276 IsEmpty]: Start isEmpty. Operand 53507 states and 227312 transitions. [2022-01-18 04:03:54,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:03:54,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:03:54,015 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:03:54,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-18 04:03:54,215 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,SelfDestructingSolverStorable58 [2022-01-18 04:03:54,216 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:03:54,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:03:54,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1561544546, now seen corresponding path program 23 times [2022-01-18 04:03:54,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:03:54,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330905135] [2022-01-18 04:03:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:03:54,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:03:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:03:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 04:03:54,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:03:54,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330905135] [2022-01-18 04:03:54,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330905135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:03:54,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027738517] [2022-01-18 04:03:54,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:03:54,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:03:54,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:03:54,306 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) [2022-01-18 04:03:54,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 04:03:54,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:03:54,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:03:54,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 04:03:54,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:03:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:54,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:03:54,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:03:54,718 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 37 treesize of output 41 [2022-01-18 04:03:54,721 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 16 treesize of output 14 [2022-01-18 04:03:54,724 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 16 treesize of output 14 [2022-01-18 04:03:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:03:55,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027738517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:03:55,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:03:55,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2022-01-18 04:03:55,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258060676] [2022-01-18 04:03:55,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:03:55,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 04:03:55,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:03:55,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 04:03:55,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:03:55,209 INFO L87 Difference]: Start difference. First operand 53507 states and 227312 transitions. Second operand has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:04:26,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:04:26,129 INFO L93 Difference]: Finished difference Result 266315 states and 998702 transitions. [2022-01-18 04:04:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 472 states. [2022-01-18 04:04:26,129 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:04:26,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:04:27,313 INFO L225 Difference]: With dead ends: 266315 [2022-01-18 04:04:27,313 INFO L226 Difference]: Without dead ends: 241588 [2022-01-18 04:04:27,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 480 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100407 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=30504, Invalid=201338, Unknown=0, NotChecked=0, Total=231842 [2022-01-18 04:04:27,326 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 3000 mSDsluCounter, 10592 mSDsCounter, 0 mSdLazyCounter, 19215 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3000 SdHoareTripleChecker+Valid, 7149 SdHoareTripleChecker+Invalid, 19841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 19215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:04:27,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3000 Valid, 7149 Invalid, 19841 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [626 Valid, 19215 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-01-18 04:04:27,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241588 states. [2022-01-18 04:04:33,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241588 to 105151. [2022-01-18 04:04:34,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105151 states, 105150 states have (on average 4.288882548739895) internal successors, (450976), 105150 states have internal predecessors, (450976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:04:34,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105151 states to 105151 states and 450976 transitions. [2022-01-18 04:04:34,540 INFO L78 Accepts]: Start accepts. Automaton has 105151 states and 450976 transitions. Word has length 33 [2022-01-18 04:04:34,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:04:34,540 INFO L470 AbstractCegarLoop]: Abstraction has 105151 states and 450976 transitions. [2022-01-18 04:04:34,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:04:34,540 INFO L276 IsEmpty]: Start isEmpty. Operand 105151 states and 450976 transitions. [2022-01-18 04:04:34,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:04:34,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:04:34,729 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:04:34,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 04:04:34,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 04:04:34,929 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:04:34,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:04:34,930 INFO L85 PathProgramCache]: Analyzing trace with hash -428595174, now seen corresponding path program 24 times [2022-01-18 04:04:34,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:04:34,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439316020] [2022-01-18 04:04:34,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:04:34,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:04:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:04:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 04:04:35,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:04:35,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439316020] [2022-01-18 04:04:35,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439316020] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:04:35,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432537392] [2022-01-18 04:04:35,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:04:35,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:04:35,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:04:35,017 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) [2022-01-18 04:04:35,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 04:04:35,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:04:35,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:04:35,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 04:04:35,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:04:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 04:04:35,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:04:35,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-18 04:04:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 04:04:36,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432537392] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:04:36,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:04:36,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-01-18 04:04:36,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178246345] [2022-01-18 04:04:36,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:04:36,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:04:36,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:04:36,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:04:36,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:04:36,034 INFO L87 Difference]: Start difference. First operand 105151 states and 450976 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 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) [2022-01-18 04:04:38,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:04:38,088 INFO L93 Difference]: Finished difference Result 157171 states and 663249 transitions. [2022-01-18 04:04:38,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:04:38,089 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 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) Word has length 33 [2022-01-18 04:04:38,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:04:39,837 INFO L225 Difference]: With dead ends: 157171 [2022-01-18 04:04:39,837 INFO L226 Difference]: Without dead ends: 153426 [2022-01-18 04:04:39,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:04:39,858 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 619 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:04:39,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 536 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:04:40,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153426 states. [2022-01-18 04:04:43,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153426 to 111142. [2022-01-18 04:04:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111142 states, 111141 states have (on average 4.314627365238751) internal successors, (479532), 111141 states have internal predecessors, (479532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:04:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111142 states to 111142 states and 479532 transitions. [2022-01-18 04:04:44,809 INFO L78 Accepts]: Start accepts. Automaton has 111142 states and 479532 transitions. Word has length 33 [2022-01-18 04:04:44,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:04:44,809 INFO L470 AbstractCegarLoop]: Abstraction has 111142 states and 479532 transitions. [2022-01-18 04:04:44,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 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) [2022-01-18 04:04:44,809 INFO L276 IsEmpty]: Start isEmpty. Operand 111142 states and 479532 transitions. [2022-01-18 04:04:44,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:04:44,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:04:44,995 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:04:45,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 04:04:45,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:04:45,195 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:04:45,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:04:45,196 INFO L85 PathProgramCache]: Analyzing trace with hash -43941796, now seen corresponding path program 25 times [2022-01-18 04:04:45,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:04:45,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71048260] [2022-01-18 04:04:45,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:04:45,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:04:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:04:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 04:04:45,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:04:45,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71048260] [2022-01-18 04:04:45,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71048260] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:04:45,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698824104] [2022-01-18 04:04:45,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:04:45,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:04:45,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:04:45,301 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) [2022-01-18 04:04:45,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 04:04:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:04:45,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 04:04:45,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:04:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 04:04:45,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:04:45,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-18 04:04:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 04:04:45,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698824104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:04:45,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:04:45,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 04:04:45,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362059281] [2022-01-18 04:04:45,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:04:45,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:04:45,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:04:45,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:04:45,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:04:45,875 INFO L87 Difference]: Start difference. First operand 111142 states and 479532 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:04:47,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:04:47,919 INFO L93 Difference]: Finished difference Result 157883 states and 663723 transitions. [2022-01-18 04:04:47,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:04:47,919 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:04:47,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:04:49,126 INFO L225 Difference]: With dead ends: 157883 [2022-01-18 04:04:49,127 INFO L226 Difference]: Without dead ends: 155564 [2022-01-18 04:04:49,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:04:49,127 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 567 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:04:49,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 657 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:04:49,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155564 states. [2022-01-18 04:04:52,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155564 to 103407. [2022-01-18 04:04:52,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103407 states, 103406 states have (on average 4.300127652167186) internal successors, (444659), 103406 states have internal predecessors, (444659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:04:53,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103407 states to 103407 states and 444659 transitions. [2022-01-18 04:04:53,497 INFO L78 Accepts]: Start accepts. Automaton has 103407 states and 444659 transitions. Word has length 33 [2022-01-18 04:04:53,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:04:53,497 INFO L470 AbstractCegarLoop]: Abstraction has 103407 states and 444659 transitions. [2022-01-18 04:04:53,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:04:53,498 INFO L276 IsEmpty]: Start isEmpty. Operand 103407 states and 444659 transitions. [2022-01-18 04:04:53,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:04:53,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:04:53,754 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:04:53,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 04:04:53,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:04:53,954 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:04:53,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:04:53,955 INFO L85 PathProgramCache]: Analyzing trace with hash -869198794, now seen corresponding path program 5 times [2022-01-18 04:04:53,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:04:53,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100615106] [2022-01-18 04:04:53,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:04:53,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:04:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:04:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:04:54,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:04:54,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100615106] [2022-01-18 04:04:54,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100615106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:04:54,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846991260] [2022-01-18 04:04:54,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:04:54,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:04:54,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:04:54,105 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) [2022-01-18 04:04:54,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 04:04:54,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:04:54,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:04:54,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 04:04:54,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:04:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:04:54,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:04:54,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:04:54,692 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 37 treesize of output 39 [2022-01-18 04:04:54,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:04:54,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 04:04:54,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:04:54,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 04:04:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:04:54,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846991260] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:04:54,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:04:54,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-18 04:04:54,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863688114] [2022-01-18 04:04:54,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:04:54,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 04:04:54,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:04:54,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 04:04:54,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:04:54,991 INFO L87 Difference]: Start difference. First operand 103407 states and 444659 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:04:57,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:04:57,425 INFO L93 Difference]: Finished difference Result 114255 states and 481959 transitions. [2022-01-18 04:04:57,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 04:04:57,426 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:04:57,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:04:57,929 INFO L225 Difference]: With dead ends: 114255 [2022-01-18 04:04:57,930 INFO L226 Difference]: Without dead ends: 114045 [2022-01-18 04:04:57,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=440, Invalid=2212, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 04:04:57,930 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 525 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 2277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1181 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:04:57,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 643 Invalid, 2277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1064 Invalid, 0 Unknown, 1181 Unchecked, 0.4s Time] [2022-01-18 04:04:58,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114045 states. [2022-01-18 04:05:00,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114045 to 106378. [2022-01-18 04:05:01,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106378 states, 106377 states have (on average 4.289752484089606) internal successors, (456331), 106377 states have internal predecessors, (456331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106378 states to 106378 states and 456331 transitions. [2022-01-18 04:05:01,966 INFO L78 Accepts]: Start accepts. Automaton has 106378 states and 456331 transitions. Word has length 33 [2022-01-18 04:05:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:05:01,967 INFO L470 AbstractCegarLoop]: Abstraction has 106378 states and 456331 transitions. [2022-01-18 04:05:01,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 106378 states and 456331 transitions. [2022-01-18 04:05:02,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:05:02,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:05:02,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:05:02,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 04:05:02,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:05:02,361 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:05:02,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:05:02,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1761411824, now seen corresponding path program 6 times [2022-01-18 04:05:02,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:05:02,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171071723] [2022-01-18 04:05:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:05:02,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:05:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:05:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:02,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:05:02,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171071723] [2022-01-18 04:05:02,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171071723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:05:02,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252643673] [2022-01-18 04:05:02,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:05:02,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:05:02,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:05:02,525 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) [2022-01-18 04:05:02,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 04:05:02,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:05:02,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:05:02,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 04:05:02,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:05:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:03,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:05:03,171 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:03,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-18 04:05:03,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:03,306 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 30 treesize of output 34 [2022-01-18 04:05:03,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:03,310 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 24 treesize of output 28 [2022-01-18 04:05:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:03,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252643673] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:05:03,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:05:03,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-18 04:05:03,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5845562] [2022-01-18 04:05:03,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:05:03,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 04:05:03,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:05:03,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 04:05:03,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:05:03,382 INFO L87 Difference]: Start difference. First operand 106378 states and 456331 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:06,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:05:06,364 INFO L93 Difference]: Finished difference Result 126893 states and 533544 transitions. [2022-01-18 04:05:06,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 04:05:06,364 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:05:06,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:05:06,909 INFO L225 Difference]: With dead ends: 126893 [2022-01-18 04:05:06,909 INFO L226 Difference]: Without dead ends: 125651 [2022-01-18 04:05:06,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 55 SyntacticMatches, 11 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=629, Invalid=3661, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 04:05:06,910 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 456 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 559 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:05:06,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 692 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1234 Invalid, 0 Unknown, 559 Unchecked, 0.5s Time] [2022-01-18 04:05:07,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125651 states. [2022-01-18 04:05:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125651 to 107742. [2022-01-18 04:05:10,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107742 states, 107741 states have (on average 4.284246479984407) internal successors, (461589), 107741 states have internal predecessors, (461589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:10,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107742 states to 107742 states and 461589 transitions. [2022-01-18 04:05:10,894 INFO L78 Accepts]: Start accepts. Automaton has 107742 states and 461589 transitions. Word has length 33 [2022-01-18 04:05:10,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:05:10,894 INFO L470 AbstractCegarLoop]: Abstraction has 107742 states and 461589 transitions. [2022-01-18 04:05:10,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:10,894 INFO L276 IsEmpty]: Start isEmpty. Operand 107742 states and 461589 transitions. [2022-01-18 04:05:11,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:05:11,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:05:11,092 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:05:11,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 04:05:11,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:05:11,294 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:05:11,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:05:11,294 INFO L85 PathProgramCache]: Analyzing trace with hash -549662216, now seen corresponding path program 2 times [2022-01-18 04:05:11,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:05:11,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890765074] [2022-01-18 04:05:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:05:11,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:05:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:05:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:11,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:05:11,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890765074] [2022-01-18 04:05:11,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890765074] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:05:11,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811178328] [2022-01-18 04:05:11,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:05:11,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:05:11,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:05:11,437 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) [2022-01-18 04:05:11,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 04:05:11,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:05:11,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:05:11,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:05:11,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:05:11,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 04:05:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:11,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:05:11,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:11,697 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 21 treesize of output 25 [2022-01-18 04:05:11,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:11,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 04:05:11,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:11,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 04:05:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:11,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811178328] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:05:11,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:05:11,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-18 04:05:11,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376642563] [2022-01-18 04:05:11,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:05:11,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:05:11,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:05:11,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:05:11,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:05:11,809 INFO L87 Difference]: Start difference. First operand 107742 states and 461589 transitions. Second operand has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:13,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:05:13,475 INFO L93 Difference]: Finished difference Result 111901 states and 474842 transitions. [2022-01-18 04:05:13,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 04:05:13,475 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:05:13,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:05:13,929 INFO L225 Difference]: With dead ends: 111901 [2022-01-18 04:05:13,929 INFO L226 Difference]: Without dead ends: 111901 [2022-01-18 04:05:13,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:05:13,930 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 238 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:05:13,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 317 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:05:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111901 states. [2022-01-18 04:05:17,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111901 to 107804. [2022-01-18 04:05:17,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107804 states, 107803 states have (on average 4.283730508427409) internal successors, (461799), 107803 states have internal predecessors, (461799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107804 states to 107804 states and 461799 transitions. [2022-01-18 04:05:17,977 INFO L78 Accepts]: Start accepts. Automaton has 107804 states and 461799 transitions. Word has length 33 [2022-01-18 04:05:17,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:05:17,977 INFO L470 AbstractCegarLoop]: Abstraction has 107804 states and 461799 transitions. [2022-01-18 04:05:17,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 107804 states and 461799 transitions. [2022-01-18 04:05:18,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:05:18,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:05:18,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:05:18,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 04:05:18,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:05:18,355 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:05:18,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:05:18,355 INFO L85 PathProgramCache]: Analyzing trace with hash 366470616, now seen corresponding path program 1 times [2022-01-18 04:05:18,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:05:18,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923496222] [2022-01-18 04:05:18,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:05:18,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:05:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:05:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:18,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:05:18,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923496222] [2022-01-18 04:05:18,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923496222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:05:18,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300693959] [2022-01-18 04:05:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:05:18,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:05:18,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:05:18,539 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) [2022-01-18 04:05:18,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 04:05:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:05:18,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 04:05:18,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:05:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:19,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:05:19,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:19,299 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:05:19,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:19,424 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-01-18 04:05:19,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:19,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-18 04:05:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:19,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300693959] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:05:19,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:05:19,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 04:05:19,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222070684] [2022-01-18 04:05:19,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:05:19,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:05:19,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:05:19,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:05:19,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:05:19,527 INFO L87 Difference]: Start difference. First operand 107804 states and 461799 transitions. Second operand has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:21,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:05:21,791 INFO L93 Difference]: Finished difference Result 113322 states and 479625 transitions. [2022-01-18 04:05:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 04:05:21,791 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:05:21,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:05:22,650 INFO L225 Difference]: With dead ends: 113322 [2022-01-18 04:05:22,650 INFO L226 Difference]: Without dead ends: 111885 [2022-01-18 04:05:22,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:05:22,663 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 376 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:05:22,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 920 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2002 Invalid, 0 Unknown, 397 Unchecked, 1.3s Time] [2022-01-18 04:05:22,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111885 states. [2022-01-18 04:05:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111885 to 108370. [2022-01-18 04:05:25,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108370 states, 108369 states have (on average 4.279895542083068) internal successors, (463808), 108369 states have internal predecessors, (463808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108370 states to 108370 states and 463808 transitions. [2022-01-18 04:05:26,122 INFO L78 Accepts]: Start accepts. Automaton has 108370 states and 463808 transitions. Word has length 33 [2022-01-18 04:05:26,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:05:26,122 INFO L470 AbstractCegarLoop]: Abstraction has 108370 states and 463808 transitions. [2022-01-18 04:05:26,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:26,122 INFO L276 IsEmpty]: Start isEmpty. Operand 108370 states and 463808 transitions. [2022-01-18 04:05:26,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:05:26,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:05:26,305 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:05:26,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 04:05:26,505 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,SelfDestructingSolverStorable65 [2022-01-18 04:05:26,506 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:05:26,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:05:26,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2105226590, now seen corresponding path program 3 times [2022-01-18 04:05:26,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:05:26,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363971152] [2022-01-18 04:05:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:05:26,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:05:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:05:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:26,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:05:26,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363971152] [2022-01-18 04:05:26,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363971152] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:05:26,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322482597] [2022-01-18 04:05:26,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:05:26,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:05:26,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:05:26,689 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) [2022-01-18 04:05:26,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 04:05:26,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 04:05:26,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:05:26,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 04:05:26,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:05:27,006 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 16 treesize of output 12 [2022-01-18 04:05:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:27,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:05:27,898 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-18 04:05:27,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 55 [2022-01-18 04:05:28,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:05:28,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:28,784 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 62 treesize of output 72 [2022-01-18 04:05:28,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:28,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 54 [2022-01-18 04:05:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:29,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322482597] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:05:29,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:05:29,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2022-01-18 04:05:29,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034357335] [2022-01-18 04:05:29,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:05:29,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 04:05:29,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:05:29,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 04:05:29,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:05:29,019 INFO L87 Difference]: Start difference. First operand 108370 states and 463808 transitions. Second operand has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:34,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:05:34,934 INFO L93 Difference]: Finished difference Result 132295 states and 547373 transitions. [2022-01-18 04:05:34,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 04:05:34,935 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:05:34,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:05:35,469 INFO L225 Difference]: With dead ends: 132295 [2022-01-18 04:05:35,470 INFO L226 Difference]: Without dead ends: 132063 [2022-01-18 04:05:35,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2912 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1302, Invalid=8400, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 04:05:35,472 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 820 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 3293 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 4053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 3293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 671 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 04:05:35,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 1458 Invalid, 4053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 3293 Invalid, 0 Unknown, 671 Unchecked, 1.4s Time] [2022-01-18 04:05:35,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132063 states. [2022-01-18 04:05:38,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132063 to 109527. [2022-01-18 04:05:39,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109527 states, 109526 states have (on average 4.270958493873601) internal successors, (467781), 109526 states have internal predecessors, (467781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:39,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109527 states to 109527 states and 467781 transitions. [2022-01-18 04:05:39,645 INFO L78 Accepts]: Start accepts. Automaton has 109527 states and 467781 transitions. Word has length 33 [2022-01-18 04:05:39,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:05:39,645 INFO L470 AbstractCegarLoop]: Abstraction has 109527 states and 467781 transitions. [2022-01-18 04:05:39,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:39,645 INFO L276 IsEmpty]: Start isEmpty. Operand 109527 states and 467781 transitions. [2022-01-18 04:05:39,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:05:39,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:05:39,837 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:05:39,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 04:05:40,037 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,SelfDestructingSolverStorable66 [2022-01-18 04:05:40,037 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:05:40,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:05:40,038 INFO L85 PathProgramCache]: Analyzing trace with hash 440573310, now seen corresponding path program 1 times [2022-01-18 04:05:40,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:05:40,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67477332] [2022-01-18 04:05:40,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:05:40,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:05:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:05:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:40,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:05:40,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67477332] [2022-01-18 04:05:40,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67477332] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:05:40,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586763655] [2022-01-18 04:05:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:05:40,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:05:40,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:05:40,269 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) [2022-01-18 04:05:40,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 04:05:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:05:40,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 04:05:40,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:05:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:40,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:05:41,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:41,435 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-18 04:05:41,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:41,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-01-18 04:05:41,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:41,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-18 04:05:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:41,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586763655] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:05:41,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:05:41,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 04:05:41,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919986760] [2022-01-18 04:05:41,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:05:41,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:05:41,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:05:41,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:05:41,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:05:41,819 INFO L87 Difference]: Start difference. First operand 109527 states and 467781 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:44,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:05:44,878 INFO L93 Difference]: Finished difference Result 132109 states and 549570 transitions. [2022-01-18 04:05:44,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 04:05:44,879 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:05:44,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:05:45,460 INFO L225 Difference]: With dead ends: 132109 [2022-01-18 04:05:45,460 INFO L226 Difference]: Without dead ends: 130716 [2022-01-18 04:05:45,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=339, Invalid=2111, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 04:05:45,461 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 494 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:05:45,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 844 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 04:05:45,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130716 states. [2022-01-18 04:05:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130716 to 110131. [2022-01-18 04:05:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110131 states, 110130 states have (on average 4.267202397166985) internal successors, (469947), 110130 states have internal predecessors, (469947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110131 states to 110131 states and 469947 transitions. [2022-01-18 04:05:49,847 INFO L78 Accepts]: Start accepts. Automaton has 110131 states and 469947 transitions. Word has length 33 [2022-01-18 04:05:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:05:49,847 INFO L470 AbstractCegarLoop]: Abstraction has 110131 states and 469947 transitions. [2022-01-18 04:05:49,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:49,848 INFO L276 IsEmpty]: Start isEmpty. Operand 110131 states and 469947 transitions. [2022-01-18 04:05:50,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:05:50,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:05:50,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:05:50,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 04:05:50,255 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,SelfDestructingSolverStorable67 [2022-01-18 04:05:50,255 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:05:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:05:50,256 INFO L85 PathProgramCache]: Analyzing trace with hash 48779896, now seen corresponding path program 4 times [2022-01-18 04:05:50,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:05:50,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168312408] [2022-01-18 04:05:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:05:50,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:05:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:05:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:50,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:05:50,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168312408] [2022-01-18 04:05:50,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168312408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:05:50,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754073758] [2022-01-18 04:05:50,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:05:50,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:05:50,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:05:50,403 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) [2022-01-18 04:05:50,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 04:05:50,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:05:50,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:05:50,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:05:50,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:05:50,572 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 16 treesize of output 12 [2022-01-18 04:05:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:50,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:05:50,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:50,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 04:05:50,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:50,722 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 28 treesize of output 32 [2022-01-18 04:05:50,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:50,727 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 04:05:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:50,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754073758] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:05:50,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:05:50,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-18 04:05:50,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373594418] [2022-01-18 04:05:50,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:05:50,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:05:50,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:05:50,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:05:50,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:05:50,772 INFO L87 Difference]: Start difference. First operand 110131 states and 469947 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:52,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:05:52,449 INFO L93 Difference]: Finished difference Result 113781 states and 481636 transitions. [2022-01-18 04:05:52,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:05:52,449 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:05:52,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:05:53,008 INFO L225 Difference]: With dead ends: 113781 [2022-01-18 04:05:53,008 INFO L226 Difference]: Without dead ends: 113781 [2022-01-18 04:05:53,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:05:53,008 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 166 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:05:53,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 332 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:05:53,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113781 states. [2022-01-18 04:05:55,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113781 to 110137. [2022-01-18 04:05:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110137 states, 110136 states have (on average 4.267169681121523) internal successors, (469969), 110136 states have internal predecessors, (469969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110137 states to 110137 states and 469969 transitions. [2022-01-18 04:05:57,213 INFO L78 Accepts]: Start accepts. Automaton has 110137 states and 469969 transitions. Word has length 33 [2022-01-18 04:05:57,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:05:57,213 INFO L470 AbstractCegarLoop]: Abstraction has 110137 states and 469969 transitions. [2022-01-18 04:05:57,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:05:57,213 INFO L276 IsEmpty]: Start isEmpty. Operand 110137 states and 469969 transitions. [2022-01-18 04:05:57,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:05:57,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:05:57,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:05:57,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 04:05:57,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:05:57,627 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:05:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:05:57,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1955188072, now seen corresponding path program 2 times [2022-01-18 04:05:57,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:05:57,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691601589] [2022-01-18 04:05:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:05:57,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:05:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:05:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:57,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:05:57,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691601589] [2022-01-18 04:05:57,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691601589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:05:57,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127112937] [2022-01-18 04:05:57,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:05:57,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:05:57,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:05:57,815 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) [2022-01-18 04:05:57,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 04:05:57,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:05:57,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:05:57,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 04:05:57,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:05:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:58,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:05:58,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:58,479 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 16 treesize of output 20 [2022-01-18 04:05:58,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:58,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-01-18 04:05:58,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:05:58,664 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-18 04:05:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:05:58,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127112937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:05:58,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:05:58,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 04:05:58,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757730986] [2022-01-18 04:05:58,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:05:58,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:05:58,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:05:58,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:05:58,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:05:58,763 INFO L87 Difference]: Start difference. First operand 110137 states and 469969 transitions. Second operand has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:02,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:06:02,833 INFO L93 Difference]: Finished difference Result 132978 states and 554601 transitions. [2022-01-18 04:06:02,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 04:06:02,833 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:06:02,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:06:03,392 INFO L225 Difference]: With dead ends: 132978 [2022-01-18 04:06:03,392 INFO L226 Difference]: Without dead ends: 131855 [2022-01-18 04:06:03,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=652, Invalid=4178, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 04:06:03,392 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 397 mSDsluCounter, 1741 mSDsCounter, 0 mSdLazyCounter, 3532 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 4125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 565 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 04:06:03,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 1244 Invalid, 4125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3532 Invalid, 0 Unknown, 565 Unchecked, 1.8s Time] [2022-01-18 04:06:04,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131855 states. [2022-01-18 04:06:07,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131855 to 110356. [2022-01-18 04:06:07,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110356 states, 110355 states have (on average 4.266594173349644) internal successors, (470840), 110355 states have internal predecessors, (470840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:08,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110356 states to 110356 states and 470840 transitions. [2022-01-18 04:06:08,466 INFO L78 Accepts]: Start accepts. Automaton has 110356 states and 470840 transitions. Word has length 33 [2022-01-18 04:06:08,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:06:08,466 INFO L470 AbstractCegarLoop]: Abstraction has 110356 states and 470840 transitions. [2022-01-18 04:06:08,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:08,466 INFO L276 IsEmpty]: Start isEmpty. Operand 110356 states and 470840 transitions. [2022-01-18 04:06:08,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:06:08,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:06:08,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:06:08,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-18 04:06:08,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 04:06:08,859 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:06:08,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:06:08,861 INFO L85 PathProgramCache]: Analyzing trace with hash -661508158, now seen corresponding path program 2 times [2022-01-18 04:06:08,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:06:08,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93923320] [2022-01-18 04:06:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:06:08,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:06:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:06:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:06:09,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:06:09,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93923320] [2022-01-18 04:06:09,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93923320] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:06:09,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764924614] [2022-01-18 04:06:09,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:06:09,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:06:09,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:06:09,116 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) [2022-01-18 04:06:09,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 04:06:09,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:06:09,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:06:09,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 04:06:09,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:06:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:06:10,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:06:10,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:06:10,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-18 04:06:10,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:06:10,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-01-18 04:06:10,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:06:10,547 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 32 treesize of output 34 [2022-01-18 04:06:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:06:10,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764924614] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:06:10,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:06:10,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 04:06:10,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100148330] [2022-01-18 04:06:10,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:06:10,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:06:10,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:06:10,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:06:10,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:06:10,637 INFO L87 Difference]: Start difference. First operand 110356 states and 470840 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:13,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:06:13,003 INFO L93 Difference]: Finished difference Result 116410 states and 489911 transitions. [2022-01-18 04:06:13,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 04:06:13,012 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:06:13,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:06:13,543 INFO L225 Difference]: With dead ends: 116410 [2022-01-18 04:06:13,543 INFO L226 Difference]: Without dead ends: 114671 [2022-01-18 04:06:13,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 04:06:13,543 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 436 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 04:06:13,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 779 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2185 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 04:06:13,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114671 states. [2022-01-18 04:06:16,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114671 to 110387. [2022-01-18 04:06:16,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110387 states, 110386 states have (on average 4.265024550214701) internal successors, (470799), 110386 states have internal predecessors, (470799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:17,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110387 states to 110387 states and 470799 transitions. [2022-01-18 04:06:17,663 INFO L78 Accepts]: Start accepts. Automaton has 110387 states and 470799 transitions. Word has length 33 [2022-01-18 04:06:17,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:06:17,663 INFO L470 AbstractCegarLoop]: Abstraction has 110387 states and 470799 transitions. [2022-01-18 04:06:17,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:17,664 INFO L276 IsEmpty]: Start isEmpty. Operand 110387 states and 470799 transitions. [2022-01-18 04:06:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:06:17,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:06:17,978 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:06:17,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 04:06:18,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:06:18,179 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:06:18,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:06:18,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1091300046, now seen corresponding path program 5 times [2022-01-18 04:06:18,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:06:18,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279239806] [2022-01-18 04:06:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:06:18,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:06:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:06:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:06:18,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:06:18,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279239806] [2022-01-18 04:06:18,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279239806] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:06:18,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064438418] [2022-01-18 04:06:18,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:06:18,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:06:18,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:06:18,359 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) [2022-01-18 04:06:18,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 04:06:18,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 04:06:18,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:06:18,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:06:18,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:06:18,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 04:06:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:06:18,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:06:18,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:06:18,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 04:06:18,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:06:18,711 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 28 treesize of output 32 [2022-01-18 04:06:18,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:06:18,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 04:06:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:06:18,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064438418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:06:18,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:06:18,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-18 04:06:18,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376589083] [2022-01-18 04:06:18,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:06:18,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:06:18,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:06:18,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:06:18,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:06:18,774 INFO L87 Difference]: Start difference. First operand 110387 states and 470799 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:19,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:06:19,908 INFO L93 Difference]: Finished difference Result 113193 states and 479370 transitions. [2022-01-18 04:06:19,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:06:19,908 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:06:19,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:06:20,977 INFO L225 Difference]: With dead ends: 113193 [2022-01-18 04:06:20,978 INFO L226 Difference]: Without dead ends: 113193 [2022-01-18 04:06:20,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:06:20,978 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 161 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:06:20,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 329 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:06:21,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113193 states. [2022-01-18 04:06:23,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113193 to 110477. [2022-01-18 04:06:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110477 states, 110476 states have (on average 4.2644194214127955) internal successors, (471116), 110476 states have internal predecessors, (471116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110477 states to 110477 states and 471116 transitions. [2022-01-18 04:06:24,477 INFO L78 Accepts]: Start accepts. Automaton has 110477 states and 471116 transitions. Word has length 33 [2022-01-18 04:06:24,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:06:24,477 INFO L470 AbstractCegarLoop]: Abstraction has 110477 states and 471116 transitions. [2022-01-18 04:06:24,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:24,477 INFO L276 IsEmpty]: Start isEmpty. Operand 110477 states and 471116 transitions. [2022-01-18 04:06:25,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:06:25,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:06:25,398 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:06:25,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 04:06:25,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:06:25,611 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:06:25,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:06:25,612 INFO L85 PathProgramCache]: Analyzing trace with hash -573353234, now seen corresponding path program 3 times [2022-01-18 04:06:25,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:06:25,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440150477] [2022-01-18 04:06:25,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:06:25,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:06:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:06:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:06:25,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:06:25,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440150477] [2022-01-18 04:06:25,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440150477] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:06:25,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872392687] [2022-01-18 04:06:25,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:06:25,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:06:25,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:06:25,818 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) [2022-01-18 04:06:25,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 04:06:25,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 04:06:25,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:06:25,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 04:06:25,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:06:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:06:26,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:06:26,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:06:26,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 25 [2022-01-18 04:06:26,799 INFO L353 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2022-01-18 04:06:26,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 54 [2022-01-18 04:06:26,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:06:26,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:06:26,808 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 42 treesize of output 50 [2022-01-18 04:06:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:06:26,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872392687] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:06:26,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:06:26,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2022-01-18 04:06:26,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536255678] [2022-01-18 04:06:26,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:06:26,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 04:06:26,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:06:26,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 04:06:26,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:06:26,882 INFO L87 Difference]: Start difference. First operand 110477 states and 471116 transitions. Second operand has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:32,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:06:32,775 INFO L93 Difference]: Finished difference Result 157435 states and 644616 transitions. [2022-01-18 04:06:32,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-18 04:06:32,775 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:06:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:06:33,980 INFO L225 Difference]: With dead ends: 157435 [2022-01-18 04:06:33,980 INFO L226 Difference]: Without dead ends: 155527 [2022-01-18 04:06:33,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3778 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1538, Invalid=9382, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 04:06:33,981 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1072 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 3800 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 3909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:06:33,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 1261 Invalid, 3909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 3800 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 04:06:34,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155527 states. [2022-01-18 04:06:37,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155527 to 111735. [2022-01-18 04:06:37,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111735 states, 111734 states have (on average 4.258641058227576) internal successors, (475835), 111734 states have internal predecessors, (475835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:38,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111735 states to 111735 states and 475835 transitions. [2022-01-18 04:06:38,802 INFO L78 Accepts]: Start accepts. Automaton has 111735 states and 475835 transitions. Word has length 33 [2022-01-18 04:06:38,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:06:38,803 INFO L470 AbstractCegarLoop]: Abstraction has 111735 states and 475835 transitions. [2022-01-18 04:06:38,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:38,803 INFO L276 IsEmpty]: Start isEmpty. Operand 111735 states and 475835 transitions. [2022-01-18 04:06:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:06:39,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:06:39,010 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:06:39,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 04:06:39,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:06:39,211 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:06:39,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:06:39,211 INFO L85 PathProgramCache]: Analyzing trace with hash 926979758, now seen corresponding path program 3 times [2022-01-18 04:06:39,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:06:39,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843588803] [2022-01-18 04:06:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:06:39,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:06:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:06:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:06:39,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:06:39,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843588803] [2022-01-18 04:06:39,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843588803] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:06:39,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885979831] [2022-01-18 04:06:39,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:06:39,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:06:39,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:06:39,422 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) [2022-01-18 04:06:39,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 04:06:39,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 04:06:39,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:06:39,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:06:39,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:06:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:06:39,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:06:39,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:06:39,894 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:06:40,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:06:40,142 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 40 treesize of output 42 [2022-01-18 04:06:40,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:06:40,147 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 32 treesize of output 34 [2022-01-18 04:06:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:06:40,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885979831] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:06:40,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:06:40,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-18 04:06:40,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395785192] [2022-01-18 04:06:40,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:06:40,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 04:06:40,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:06:40,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 04:06:40,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:06:40,232 INFO L87 Difference]: Start difference. First operand 111735 states and 475835 transitions. Second operand has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 23 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:42,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:06:42,412 INFO L93 Difference]: Finished difference Result 115031 states and 486231 transitions. [2022-01-18 04:06:42,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:06:42,413 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 23 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:06:42,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:06:42,924 INFO L225 Difference]: With dead ends: 115031 [2022-01-18 04:06:42,925 INFO L226 Difference]: Without dead ends: 114127 [2022-01-18 04:06:42,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:06:42,925 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 323 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 2111 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 04:06:42,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 704 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2111 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 04:06:43,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114127 states. [2022-01-18 04:06:46,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114127 to 111784. [2022-01-18 04:06:46,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111784 states, 111783 states have (on average 4.257990928853225) internal successors, (475971), 111783 states have internal predecessors, (475971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:47,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111784 states to 111784 states and 475971 transitions. [2022-01-18 04:06:47,022 INFO L78 Accepts]: Start accepts. Automaton has 111784 states and 475971 transitions. Word has length 33 [2022-01-18 04:06:47,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:06:47,022 INFO L470 AbstractCegarLoop]: Abstraction has 111784 states and 475971 transitions. [2022-01-18 04:06:47,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 23 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:47,022 INFO L276 IsEmpty]: Start isEmpty. Operand 111784 states and 475971 transitions. [2022-01-18 04:06:47,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:06:47,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:06:47,207 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:06:47,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 04:06:47,409 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,SelfDestructingSolverStorable73 [2022-01-18 04:06:47,409 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:06:47,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:06:47,409 INFO L85 PathProgramCache]: Analyzing trace with hash -26068854, now seen corresponding path program 6 times [2022-01-18 04:06:47,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:06:47,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752706163] [2022-01-18 04:06:47,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:06:47,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:06:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:06:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:06:47,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:06:47,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752706163] [2022-01-18 04:06:47,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752706163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:06:47,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644225394] [2022-01-18 04:06:47,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:06:47,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:06:47,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:06:47,577 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) [2022-01-18 04:06:47,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 04:06:47,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 04:06:47,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:06:47,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:06:47,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:06:47,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 04:06:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:06:47,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:06:47,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:06:47,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 04:06:47,905 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:06:47,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 04:06:47,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:06:47,911 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 22 treesize of output 26 [2022-01-18 04:06:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:06:47,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644225394] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:06:47,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:06:47,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-18 04:06:47,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130201561] [2022-01-18 04:06:47,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:06:47,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:06:47,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:06:47,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:06:47,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:06:47,955 INFO L87 Difference]: Start difference. First operand 111784 states and 475971 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:49,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:06:49,588 INFO L93 Difference]: Finished difference Result 114614 states and 484536 transitions. [2022-01-18 04:06:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:06:49,589 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:06:49,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:06:50,082 INFO L225 Difference]: With dead ends: 114614 [2022-01-18 04:06:50,082 INFO L226 Difference]: Without dead ends: 114614 [2022-01-18 04:06:50,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:06:50,082 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 179 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:06:50,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 322 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:06:50,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114614 states. [2022-01-18 04:06:53,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114614 to 111630. [2022-01-18 04:06:53,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111630 states, 111629 states have (on average 4.258929131318922) internal successors, (475420), 111629 states have internal predecessors, (475420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:54,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111630 states to 111630 states and 475420 transitions. [2022-01-18 04:06:54,221 INFO L78 Accepts]: Start accepts. Automaton has 111630 states and 475420 transitions. Word has length 33 [2022-01-18 04:06:54,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:06:54,221 INFO L470 AbstractCegarLoop]: Abstraction has 111630 states and 475420 transitions. [2022-01-18 04:06:54,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:54,221 INFO L276 IsEmpty]: Start isEmpty. Operand 111630 states and 475420 transitions. [2022-01-18 04:06:54,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:06:54,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:06:54,406 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:06:54,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 04:06:54,607 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,SelfDestructingSolverStorable74 [2022-01-18 04:06:54,608 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:06:54,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:06:54,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1690722134, now seen corresponding path program 4 times [2022-01-18 04:06:54,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:06:54,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363607663] [2022-01-18 04:06:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:06:54,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:06:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:06:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:06:54,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:06:54,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363607663] [2022-01-18 04:06:54,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363607663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:06:54,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317880208] [2022-01-18 04:06:54,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:06:54,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:06:54,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:06:54,872 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) [2022-01-18 04:06:54,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 04:06:54,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:06:54,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:06:54,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 04:06:54,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:06:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:06:55,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:06:55,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:06:55,511 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2022-01-18 04:06:55,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:06:55,674 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-01-18 04:06:55,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:06:55,680 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-18 04:06:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:06:55,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317880208] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:06:55,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:06:55,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 04:06:55,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116918542] [2022-01-18 04:06:55,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:06:55,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:06:55,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:06:55,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:06:55,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:06:55,759 INFO L87 Difference]: Start difference. First operand 111630 states and 475420 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:06:59,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:06:59,061 INFO L93 Difference]: Finished difference Result 131686 states and 549004 transitions. [2022-01-18 04:06:59,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 04:06:59,061 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:06:59,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:07:00,081 INFO L225 Difference]: With dead ends: 131686 [2022-01-18 04:07:00,082 INFO L226 Difference]: Without dead ends: 130178 [2022-01-18 04:07:00,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=369, Invalid=2181, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 04:07:00,082 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 562 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 3224 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 3267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:07:00,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1129 Invalid, 3267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3224 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 04:07:00,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130178 states. [2022-01-18 04:07:03,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130178 to 111603. [2022-01-18 04:07:03,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111603 states, 111602 states have (on average 4.261106431784377) internal successors, (475548), 111602 states have internal predecessors, (475548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:07:04,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111603 states to 111603 states and 475548 transitions. [2022-01-18 04:07:04,426 INFO L78 Accepts]: Start accepts. Automaton has 111603 states and 475548 transitions. Word has length 33 [2022-01-18 04:07:04,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:07:04,426 INFO L470 AbstractCegarLoop]: Abstraction has 111603 states and 475548 transitions. [2022-01-18 04:07:04,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:07:04,426 INFO L276 IsEmpty]: Start isEmpty. Operand 111603 states and 475548 transitions. [2022-01-18 04:07:04,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:07:04,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:07:04,758 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:07:04,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-18 04:07:04,959 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,SelfDestructingSolverStorable75 [2022-01-18 04:07:04,959 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:07:04,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:07:04,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1111394312, now seen corresponding path program 3 times [2022-01-18 04:07:04,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:07:04,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876749453] [2022-01-18 04:07:04,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:07:04,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:07:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:07:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:07:05,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:07:05,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876749453] [2022-01-18 04:07:05,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876749453] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:07:05,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604339946] [2022-01-18 04:07:05,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:07:05,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:07:05,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:07:05,073 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) [2022-01-18 04:07:05,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 04:07:05,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:07:05,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:07:05,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 04:07:05,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:07:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:07:05,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:07:06,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:07:06,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 54 [2022-01-18 04:07:06,718 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-18 04:07:06,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 53 [2022-01-18 04:07:06,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:07:06,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:07:06,727 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 39 treesize of output 49 [2022-01-18 04:07:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:07:06,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604339946] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:07:06,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:07:06,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 33 [2022-01-18 04:07:06,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720750842] [2022-01-18 04:07:06,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:07:06,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 04:07:06,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:07:06,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 04:07:06,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 04:07:06,988 INFO L87 Difference]: Start difference. First operand 111603 states and 475548 transitions. Second operand has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:07:15,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:07:15,654 INFO L93 Difference]: Finished difference Result 131142 states and 545110 transitions. [2022-01-18 04:07:15,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-18 04:07:15,654 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:07:15,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:07:16,205 INFO L225 Difference]: With dead ends: 131142 [2022-01-18 04:07:16,205 INFO L226 Difference]: Without dead ends: 130569 [2022-01-18 04:07:16,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 60 SyntacticMatches, 29 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9832 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1866, Invalid=20184, Unknown=2, NotChecked=0, Total=22052 [2022-01-18 04:07:16,206 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 643 mSDsluCounter, 3311 mSDsCounter, 0 mSdLazyCounter, 3391 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 2481 SdHoareTripleChecker+Invalid, 6255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2805 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:07:16,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 2481 Invalid, 6255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 3391 Invalid, 0 Unknown, 2805 Unchecked, 1.6s Time] [2022-01-18 04:07:16,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130569 states. [2022-01-18 04:07:19,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130569 to 113418. [2022-01-18 04:07:20,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113418 states, 113417 states have (on average 4.25434458679034) internal successors, (482515), 113417 states have internal predecessors, (482515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:07:20,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113418 states to 113418 states and 482515 transitions. [2022-01-18 04:07:20,613 INFO L78 Accepts]: Start accepts. Automaton has 113418 states and 482515 transitions. Word has length 33 [2022-01-18 04:07:20,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:07:20,614 INFO L470 AbstractCegarLoop]: Abstraction has 113418 states and 482515 transitions. [2022-01-18 04:07:20,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:07:20,614 INFO L276 IsEmpty]: Start isEmpty. Operand 113418 states and 482515 transitions. [2022-01-18 04:07:20,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:07:20,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:07:20,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:07:20,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-01-18 04:07:21,000 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,SelfDestructingSolverStorable76 [2022-01-18 04:07:21,001 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:07:21,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:07:21,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1040506978, now seen corresponding path program 4 times [2022-01-18 04:07:21,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:07:21,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697891051] [2022-01-18 04:07:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:07:21,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:07:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:07:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:07:21,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:07:21,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697891051] [2022-01-18 04:07:21,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697891051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:07:21,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846503444] [2022-01-18 04:07:21,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:07:21,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:07:21,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:07:21,097 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) [2022-01-18 04:07:21,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 04:07:21,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:07:21,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:07:21,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:07:21,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:07:21,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 04:07:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:07:21,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:07:21,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:07:21,326 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 16 treesize of output 20 [2022-01-18 04:07:21,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:07:21,382 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 04:07:21,387 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:07:21,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 04:07:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:07:21,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846503444] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:07:21,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:07:21,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-01-18 04:07:21,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513304066] [2022-01-18 04:07:21,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:07:21,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:07:21,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:07:21,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:07:21,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:07:21,465 INFO L87 Difference]: Start difference. First operand 113418 states and 482515 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:07:24,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:07:24,062 INFO L93 Difference]: Finished difference Result 135782 states and 559081 transitions. [2022-01-18 04:07:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 04:07:24,062 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:07:24,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:07:25,141 INFO L225 Difference]: With dead ends: 135782 [2022-01-18 04:07:25,142 INFO L226 Difference]: Without dead ends: 135454 [2022-01-18 04:07:25,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=1343, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 04:07:25,143 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 453 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 2535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 04:07:25,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 837 Invalid, 2535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 04:07:25,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135454 states. [2022-01-18 04:07:28,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135454 to 115676. [2022-01-18 04:07:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115676 states, 115675 states have (on average 4.249630430084288) internal successors, (491576), 115675 states have internal predecessors, (491576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:07:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115676 states to 115676 states and 491576 transitions. [2022-01-18 04:07:29,842 INFO L78 Accepts]: Start accepts. Automaton has 115676 states and 491576 transitions. Word has length 33 [2022-01-18 04:07:29,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:07:29,842 INFO L470 AbstractCegarLoop]: Abstraction has 115676 states and 491576 transitions. [2022-01-18 04:07:29,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:07:29,843 INFO L276 IsEmpty]: Start isEmpty. Operand 115676 states and 491576 transitions. [2022-01-18 04:07:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:07:30,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:07:30,059 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:07:30,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 04:07:30,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:07:30,260 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:07:30,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:07:30,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1589807038, now seen corresponding path program 7 times [2022-01-18 04:07:30,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:07:30,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885900074] [2022-01-18 04:07:30,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:07:30,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:07:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:07:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:07:30,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:07:30,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885900074] [2022-01-18 04:07:30,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885900074] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:07:30,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493479089] [2022-01-18 04:07:30,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:07:30,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:07:30,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:07:30,415 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) [2022-01-18 04:07:30,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 04:07:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:07:30,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 04:07:30,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:07:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:07:30,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:07:31,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:07:31,012 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 04:07:31,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:07:31,217 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 04:07:31,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:07:31,221 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:07:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:07:31,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493479089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:07:31,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:07:31,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 04:07:31,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772043858] [2022-01-18 04:07:31,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:07:31,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:07:31,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:07:31,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:07:31,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:07:31,307 INFO L87 Difference]: Start difference. First operand 115676 states and 491576 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-18 04:07:33,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:07:33,652 INFO L93 Difference]: Finished difference Result 125793 states and 526164 transitions. [2022-01-18 04:07:33,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 04:07:33,652 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) Word has length 33 [2022-01-18 04:07:33,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:07:34,199 INFO L225 Difference]: With dead ends: 125793 [2022-01-18 04:07:34,199 INFO L226 Difference]: Without dead ends: 125636 [2022-01-18 04:07:34,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 04:07:34,199 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 396 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:07:34,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 814 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1651 Invalid, 0 Unknown, 345 Unchecked, 0.6s Time] [2022-01-18 04:07:34,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125636 states. [2022-01-18 04:07:38,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125636 to 116869. [2022-01-18 04:07:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116869 states, 116868 states have (on average 4.2461067186911725) internal successors, (496234), 116868 states have internal predecessors, (496234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:07:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116869 states to 116869 states and 496234 transitions. [2022-01-18 04:07:39,220 INFO L78 Accepts]: Start accepts. Automaton has 116869 states and 496234 transitions. Word has length 33 [2022-01-18 04:07:39,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:07:39,220 INFO L470 AbstractCegarLoop]: Abstraction has 116869 states and 496234 transitions. [2022-01-18 04:07:39,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-18 04:07:39,220 INFO L276 IsEmpty]: Start isEmpty. Operand 116869 states and 496234 transitions. [2022-01-18 04:07:40,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:07:40,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:07:40,090 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:07:40,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-18 04:07:40,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:07:40,312 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:07:40,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:07:40,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1693413474, now seen corresponding path program 5 times [2022-01-18 04:07:40,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:07:40,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900555249] [2022-01-18 04:07:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:07:40,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:07:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:07:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:07:40,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:07:40,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900555249] [2022-01-18 04:07:40,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900555249] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:07:40,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134854673] [2022-01-18 04:07:40,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:07:40,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:07:40,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:07:40,427 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) [2022-01-18 04:07:40,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 04:07:40,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:07:40,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:07:40,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:07:40,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:07:40,597 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 15 treesize of output 11 [2022-01-18 04:07:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:07:40,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:07:40,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:07:40,636 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 16 treesize of output 20 [2022-01-18 04:07:40,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:07:40,690 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 24 treesize of output 28 [2022-01-18 04:07:40,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:07:40,695 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 04:07:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:07:40,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134854673] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:07:40,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:07:40,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-01-18 04:07:40,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395679802] [2022-01-18 04:07:40,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:07:40,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:07:40,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:07:40,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:07:40,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:07:40,768 INFO L87 Difference]: Start difference. First operand 116869 states and 496234 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:07:43,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:07:43,497 INFO L93 Difference]: Finished difference Result 143634 states and 590203 transitions. [2022-01-18 04:07:43,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 04:07:43,498 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:07:43,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:07:44,211 INFO L225 Difference]: With dead ends: 143634 [2022-01-18 04:07:44,211 INFO L226 Difference]: Without dead ends: 142971 [2022-01-18 04:07:44,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 04:07:44,212 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 468 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 04:07:44,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 913 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 04:07:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142971 states. [2022-01-18 04:07:48,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142971 to 119839. [2022-01-18 04:07:48,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119839 states, 119838 states have (on average 4.238905856239256) internal successors, (507982), 119838 states have internal predecessors, (507982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:07:49,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119839 states to 119839 states and 507982 transitions. [2022-01-18 04:07:49,051 INFO L78 Accepts]: Start accepts. Automaton has 119839 states and 507982 transitions. Word has length 33 [2022-01-18 04:07:49,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:07:49,051 INFO L470 AbstractCegarLoop]: Abstraction has 119839 states and 507982 transitions. [2022-01-18 04:07:49,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:07:49,051 INFO L276 IsEmpty]: Start isEmpty. Operand 119839 states and 507982 transitions. [2022-01-18 04:07:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:07:49,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:07:49,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:07:49,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 04:07:49,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-01-18 04:07:49,474 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:07:49,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:07:49,475 INFO L85 PathProgramCache]: Analyzing trace with hash 633768234, now seen corresponding path program 8 times [2022-01-18 04:07:49,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:07:49,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493448950] [2022-01-18 04:07:49,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:07:49,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:07:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:07:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:07:49,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:07:49,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493448950] [2022-01-18 04:07:49,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493448950] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:07:49,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649149677] [2022-01-18 04:07:49,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:07:49,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:07:49,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:07:49,629 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) [2022-01-18 04:07:49,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 04:07:49,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:07:49,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:07:49,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 04:07:49,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:07:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:07:50,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:07:50,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:07:50,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 04:07:51,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:07:51,039 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 04:07:51,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:07:51,044 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 20 treesize of output 24 [2022-01-18 04:07:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:07:51,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649149677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:07:51,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:07:51,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 04:07:51,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585198610] [2022-01-18 04:07:51,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:07:51,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:07:51,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:07:51,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:07:51,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:07:51,132 INFO L87 Difference]: Start difference. First operand 119839 states and 507982 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-18 04:07:52,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:07:52,863 INFO L93 Difference]: Finished difference Result 129184 states and 539154 transitions. [2022-01-18 04:07:52,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 04:07:52,864 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) Word has length 33 [2022-01-18 04:07:52,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:07:53,946 INFO L225 Difference]: With dead ends: 129184 [2022-01-18 04:07:53,946 INFO L226 Difference]: Without dead ends: 129110 [2022-01-18 04:07:53,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 04:07:53,947 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 406 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:07:53,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 722 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1344 Invalid, 0 Unknown, 232 Unchecked, 0.5s Time] [2022-01-18 04:07:54,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129110 states. [2022-01-18 04:07:57,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129110 to 119993. [2022-01-18 04:07:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119993 states, 119992 states have (on average 4.237399159943997) internal successors, (508454), 119992 states have internal predecessors, (508454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:07:58,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119993 states to 119993 states and 508454 transitions. [2022-01-18 04:07:58,612 INFO L78 Accepts]: Start accepts. Automaton has 119993 states and 508454 transitions. Word has length 33 [2022-01-18 04:07:58,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:07:58,612 INFO L470 AbstractCegarLoop]: Abstraction has 119993 states and 508454 transitions. [2022-01-18 04:07:58,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-18 04:07:58,612 INFO L276 IsEmpty]: Start isEmpty. Operand 119993 states and 508454 transitions. [2022-01-18 04:07:58,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:07:58,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:07:58,827 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:07:58,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 04:07:59,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:07:59,027 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:07:59,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:07:59,028 INFO L85 PathProgramCache]: Analyzing trace with hash -258444796, now seen corresponding path program 9 times [2022-01-18 04:07:59,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:07:59,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999088885] [2022-01-18 04:07:59,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:07:59,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:07:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:07:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:07:59,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:07:59,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999088885] [2022-01-18 04:07:59,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999088885] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:07:59,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130523580] [2022-01-18 04:07:59,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:07:59,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:07:59,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:07:59,187 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) [2022-01-18 04:07:59,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 04:07:59,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:07:59,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:07:59,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 04:07:59,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:07:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:07:59,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:08:00,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:08:00,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-18 04:08:00,448 INFO L353 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2022-01-18 04:08:00,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 71 [2022-01-18 04:08:00,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:08:00,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:08:00,458 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 53 treesize of output 59 [2022-01-18 04:08:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:08:00,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130523580] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:08:00,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:08:00,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 31 [2022-01-18 04:08:00,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833912030] [2022-01-18 04:08:00,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:08:00,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 04:08:00,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:08:00,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 04:08:00,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:08:00,756 INFO L87 Difference]: Start difference. First operand 119993 states and 508454 transitions. Second operand has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:08:08,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:08:08,354 INFO L93 Difference]: Finished difference Result 191717 states and 793130 transitions. [2022-01-18 04:08:08,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 04:08:08,355 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:08:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:08:09,786 INFO L225 Difference]: With dead ends: 191717 [2022-01-18 04:08:09,787 INFO L226 Difference]: Without dead ends: 189244 [2022-01-18 04:08:09,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3237 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1074, Invalid=8628, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 04:08:09,788 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 880 mSDsluCounter, 2090 mSDsCounter, 0 mSdLazyCounter, 4838 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 4949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 4838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:08:09,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [880 Valid, 1582 Invalid, 4949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 4838 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-18 04:08:09,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189244 states. [2022-01-18 04:08:14,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189244 to 120929. [2022-01-18 04:08:14,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120929 states, 120928 states have (on average 4.232956800740936) internal successors, (511883), 120928 states have internal predecessors, (511883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:08:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120929 states to 120929 states and 511883 transitions. [2022-01-18 04:08:15,143 INFO L78 Accepts]: Start accepts. Automaton has 120929 states and 511883 transitions. Word has length 33 [2022-01-18 04:08:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:08:15,143 INFO L470 AbstractCegarLoop]: Abstraction has 120929 states and 511883 transitions. [2022-01-18 04:08:15,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:08:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 120929 states and 511883 transitions. [2022-01-18 04:08:15,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:08:15,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:08:15,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:08:15,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 04:08:15,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:08:15,557 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:08:15,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:08:15,557 INFO L85 PathProgramCache]: Analyzing trace with hash 768377782, now seen corresponding path program 10 times [2022-01-18 04:08:15,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:08:15,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209415193] [2022-01-18 04:08:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:08:15,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:08:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:08:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:08:15,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:08:15,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209415193] [2022-01-18 04:08:15,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209415193] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:08:15,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146334406] [2022-01-18 04:08:15,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:08:15,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:08:15,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:08:15,704 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) [2022-01-18 04:08:15,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 04:08:15,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:08:15,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:08:15,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 04:08:15,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:08:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:08:16,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:08:16,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:08:16,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 04:08:17,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:08:17,124 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 04:08:17,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:08:17,128 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:08:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:08:17,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146334406] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:08:17,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:08:17,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 04:08:17,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243574473] [2022-01-18 04:08:17,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:08:17,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:08:17,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:08:17,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:08:17,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:08:17,224 INFO L87 Difference]: Start difference. First operand 120929 states and 511883 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-18 04:08:20,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:08:20,314 INFO L93 Difference]: Finished difference Result 138250 states and 569664 transitions. [2022-01-18 04:08:20,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 04:08:20,315 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) Word has length 33 [2022-01-18 04:08:20,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:08:20,942 INFO L225 Difference]: With dead ends: 138250 [2022-01-18 04:08:20,943 INFO L226 Difference]: Without dead ends: 137939 [2022-01-18 04:08:20,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 61 SyntacticMatches, 18 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=676, Invalid=3484, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 04:08:20,943 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 662 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 2266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 767 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:08:20,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 862 Invalid, 2266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1461 Invalid, 0 Unknown, 767 Unchecked, 0.6s Time] [2022-01-18 04:08:21,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137939 states. [2022-01-18 04:08:24,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137939 to 122572. [2022-01-18 04:08:25,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122572 states, 122571 states have (on average 4.226994966182866) internal successors, (518107), 122571 states have internal predecessors, (518107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:08:25,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122572 states to 122572 states and 518107 transitions. [2022-01-18 04:08:25,711 INFO L78 Accepts]: Start accepts. Automaton has 122572 states and 518107 transitions. Word has length 33 [2022-01-18 04:08:25,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:08:25,711 INFO L470 AbstractCegarLoop]: Abstraction has 122572 states and 518107 transitions. [2022-01-18 04:08:25,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-18 04:08:25,711 INFO L276 IsEmpty]: Start isEmpty. Operand 122572 states and 518107 transitions. [2022-01-18 04:08:25,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:08:25,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:08:25,931 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:08:25,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 04:08:26,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:08:26,132 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:08:26,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:08:26,133 INFO L85 PathProgramCache]: Analyzing trace with hash 146497372, now seen corresponding path program 11 times [2022-01-18 04:08:26,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:08:26,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585127072] [2022-01-18 04:08:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:08:26,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:08:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:08:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:08:26,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:08:26,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585127072] [2022-01-18 04:08:26,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585127072] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:08:26,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545443531] [2022-01-18 04:08:26,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:08:26,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:08:26,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:08:26,262 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) [2022-01-18 04:08:26,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 04:08:26,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:08:26,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:08:26,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 04:08:26,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:08:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:08:27,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:08:27,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:08:27,459 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 37 treesize of output 39 [2022-01-18 04:08:27,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:08:27,637 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 04:08:27,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:08:27,642 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:08:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:08:27,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545443531] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:08:27,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:08:27,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 04:08:27,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851044923] [2022-01-18 04:08:27,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:08:27,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:08:27,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:08:27,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:08:27,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:08:27,730 INFO L87 Difference]: Start difference. First operand 122572 states and 518107 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-18 04:08:30,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:08:30,969 INFO L93 Difference]: Finished difference Result 142469 states and 583741 transitions. [2022-01-18 04:08:30,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 04:08:30,970 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) Word has length 33 [2022-01-18 04:08:30,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:08:31,605 INFO L225 Difference]: With dead ends: 142469 [2022-01-18 04:08:31,605 INFO L226 Difference]: Without dead ends: 137307 [2022-01-18 04:08:31,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=725, Invalid=3697, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 04:08:31,606 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 789 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 1767 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1459 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 04:08:31,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 892 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1767 Invalid, 0 Unknown, 1459 Unchecked, 0.7s Time] [2022-01-18 04:08:31,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137307 states. [2022-01-18 04:08:35,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137307 to 122047. [2022-01-18 04:08:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122047 states, 122046 states have (on average 4.225283909345657) internal successors, (515679), 122046 states have internal predecessors, (515679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:08:36,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122047 states to 122047 states and 515679 transitions. [2022-01-18 04:08:36,425 INFO L78 Accepts]: Start accepts. Automaton has 122047 states and 515679 transitions. Word has length 33 [2022-01-18 04:08:36,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:08:36,425 INFO L470 AbstractCegarLoop]: Abstraction has 122047 states and 515679 transitions. [2022-01-18 04:08:36,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-18 04:08:36,425 INFO L276 IsEmpty]: Start isEmpty. Operand 122047 states and 515679 transitions. [2022-01-18 04:08:37,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:08:37,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:08:37,398 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:08:37,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-01-18 04:08:37,598 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,SelfDestructingSolverStorable83 [2022-01-18 04:08:37,598 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:08:37,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:08:37,599 INFO L85 PathProgramCache]: Analyzing trace with hash 807748098, now seen corresponding path program 12 times [2022-01-18 04:08:37,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:08:37,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807125993] [2022-01-18 04:08:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:08:37,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:08:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:08:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:08:37,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:08:37,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807125993] [2022-01-18 04:08:37,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807125993] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:08:37,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936234476] [2022-01-18 04:08:37,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:08:37,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:08:37,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:08:37,718 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) [2022-01-18 04:08:37,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 04:08:37,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:08:37,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:08:37,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 04:08:37,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:08:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:08:38,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:08:38,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:08:38,276 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 37 treesize of output 39 [2022-01-18 04:08:38,438 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:08:38,438 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 04:08:38,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:08:38,443 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 20 treesize of output 24 [2022-01-18 04:08:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:08:38,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936234476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:08:38,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:08:38,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 04:08:38,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763785708] [2022-01-18 04:08:38,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:08:38,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:08:38,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:08:38,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:08:38,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:08:38,535 INFO L87 Difference]: Start difference. First operand 122047 states and 515679 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-18 04:08:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:08:41,844 INFO L93 Difference]: Finished difference Result 137702 states and 565960 transitions. [2022-01-18 04:08:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 04:08:41,844 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) Word has length 33 [2022-01-18 04:08:41,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:08:42,499 INFO L225 Difference]: With dead ends: 137702 [2022-01-18 04:08:42,499 INFO L226 Difference]: Without dead ends: 135594 [2022-01-18 04:08:42,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=679, Invalid=3611, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 04:08:42,500 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 725 mSDsluCounter, 1413 mSDsCounter, 0 mSdLazyCounter, 1785 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 3498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1652 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 04:08:42,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 1040 Invalid, 3498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1785 Invalid, 0 Unknown, 1652 Unchecked, 0.7s Time] [2022-01-18 04:08:42,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135594 states. [2022-01-18 04:08:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135594 to 121168. [2022-01-18 04:08:46,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121168 states, 121167 states have (on average 4.229055766008897) internal successors, (512422), 121167 states have internal predecessors, (512422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:08:47,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121168 states to 121168 states and 512422 transitions. [2022-01-18 04:08:47,840 INFO L78 Accepts]: Start accepts. Automaton has 121168 states and 512422 transitions. Word has length 33 [2022-01-18 04:08:47,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:08:47,840 INFO L470 AbstractCegarLoop]: Abstraction has 121168 states and 512422 transitions. [2022-01-18 04:08:47,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-18 04:08:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 121168 states and 512422 transitions. [2022-01-18 04:08:48,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:08:48,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:08:48,183 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:08:48,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 04:08:48,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:08:48,384 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:08:48,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:08:48,384 INFO L85 PathProgramCache]: Analyzing trace with hash 661686196, now seen corresponding path program 6 times [2022-01-18 04:08:48,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:08:48,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708319588] [2022-01-18 04:08:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:08:48,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:08:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:08:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:08:48,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:08:48,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708319588] [2022-01-18 04:08:48,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708319588] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:08:48,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247234463] [2022-01-18 04:08:48,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:08:48,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:08:48,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:08:48,507 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) [2022-01-18 04:08:48,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 04:08:48,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:08:48,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:08:48,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 04:08:48,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:08:49,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:08:49,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 04:08:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:08:49,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:08:49,349 INFO L353 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2022-01-18 04:08:49,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 56 [2022-01-18 04:08:49,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:08:49,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 46 [2022-01-18 04:08:49,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:08:49,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 46 [2022-01-18 04:08:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:08:49,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247234463] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:08:49,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:08:49,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 12] total 28 [2022-01-18 04:08:49,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406817455] [2022-01-18 04:08:49,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:08:49,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 04:08:49,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:08:49,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 04:08:49,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:08:49,653 INFO L87 Difference]: Start difference. First operand 121168 states and 512422 transitions. Second operand has 29 states, 29 states have (on average 3.0) internal successors, (87), 28 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) [2022-01-18 04:08:56,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:08:56,936 INFO L93 Difference]: Finished difference Result 196089 states and 798153 transitions. [2022-01-18 04:08:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-18 04:08:56,936 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0) internal successors, (87), 28 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) Word has length 33 [2022-01-18 04:08:56,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:08:57,952 INFO L225 Difference]: With dead ends: 196089 [2022-01-18 04:08:57,953 INFO L226 Difference]: Without dead ends: 195645 [2022-01-18 04:08:57,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5757 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1924, Invalid=14332, Unknown=0, NotChecked=0, Total=16256 [2022-01-18 04:08:57,953 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 783 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 3626 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 5704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 3626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1998 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 04:08:57,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 1388 Invalid, 5704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 3626 Invalid, 0 Unknown, 1998 Unchecked, 1.7s Time] [2022-01-18 04:08:58,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195645 states. [2022-01-18 04:09:03,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195645 to 130884. [2022-01-18 04:09:03,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130884 states, 130883 states have (on average 4.198581939594906) internal successors, (549523), 130883 states have internal predecessors, (549523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130884 states to 130884 states and 549523 transitions. [2022-01-18 04:09:04,356 INFO L78 Accepts]: Start accepts. Automaton has 130884 states and 549523 transitions. Word has length 33 [2022-01-18 04:09:04,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:09:04,356 INFO L470 AbstractCegarLoop]: Abstraction has 130884 states and 549523 transitions. [2022-01-18 04:09:04,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0) internal successors, (87), 28 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) [2022-01-18 04:09:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand 130884 states and 549523 transitions. [2022-01-18 04:09:04,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:09:04,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:09:04,620 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:09:04,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 04:09:04,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:09:04,821 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:09:04,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:09:04,822 INFO L85 PathProgramCache]: Analyzing trace with hash -268128946, now seen corresponding path program 7 times [2022-01-18 04:09:04,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:09:04,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368420595] [2022-01-18 04:09:04,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:09:04,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:09:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:09:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:04,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:09:04,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368420595] [2022-01-18 04:09:04,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368420595] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:09:04,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963912763] [2022-01-18 04:09:04,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:09:04,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:09:04,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:09:04,937 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) [2022-01-18 04:09:04,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 04:09:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:09:04,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:09:04,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:09:05,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:09:05,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:09:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:05,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:09:05,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:09:05,194 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:09:05,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:09:05,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 04:09:05,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:09:05,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 28 [2022-01-18 04:09:05,296 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:05,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963912763] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:09:05,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:09:05,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2022-01-18 04:09:05,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392092357] [2022-01-18 04:09:05,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:09:05,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:09:05,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:09:05,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:09:05,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:09:05,297 INFO L87 Difference]: Start difference. First operand 130884 states and 549523 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 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) [2022-01-18 04:09:08,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:09:08,160 INFO L93 Difference]: Finished difference Result 161447 states and 659679 transitions. [2022-01-18 04:09:08,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 04:09:08,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 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) Word has length 33 [2022-01-18 04:09:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:09:09,944 INFO L225 Difference]: With dead ends: 161447 [2022-01-18 04:09:09,944 INFO L226 Difference]: Without dead ends: 160415 [2022-01-18 04:09:09,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=1773, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 04:09:09,944 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 275 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 2172 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 2506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 04:09:09,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 986 Invalid, 2506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2172 Invalid, 0 Unknown, 321 Unchecked, 0.8s Time] [2022-01-18 04:09:10,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160415 states. [2022-01-18 04:09:14,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160415 to 127826. [2022-01-18 04:09:14,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127826 states, 127825 states have (on average 4.220496772931742) internal successors, (539485), 127825 states have internal predecessors, (539485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127826 states to 127826 states and 539485 transitions. [2022-01-18 04:09:15,813 INFO L78 Accepts]: Start accepts. Automaton has 127826 states and 539485 transitions. Word has length 33 [2022-01-18 04:09:15,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:09:15,813 INFO L470 AbstractCegarLoop]: Abstraction has 127826 states and 539485 transitions. [2022-01-18 04:09:15,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 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) [2022-01-18 04:09:15,813 INFO L276 IsEmpty]: Start isEmpty. Operand 127826 states and 539485 transitions. [2022-01-18 04:09:16,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:09:16,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:09:16,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:09:16,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 04:09:16,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:09:16,229 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:09:16,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:09:16,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1609718856, now seen corresponding path program 13 times [2022-01-18 04:09:16,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:09:16,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567211444] [2022-01-18 04:09:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:09:16,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:09:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:09:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:16,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:09:16,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567211444] [2022-01-18 04:09:16,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567211444] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:09:16,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924683563] [2022-01-18 04:09:16,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:09:16,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:09:16,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:09:16,411 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) [2022-01-18 04:09:16,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 04:09:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:09:16,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 04:09:16,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:09:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:16,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:09:17,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:09:17,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 04:09:17,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:09:17,276 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 26 treesize of output 30 [2022-01-18 04:09:17,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:09:17,281 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 20 treesize of output 24 [2022-01-18 04:09:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:17,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924683563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:09:17,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:09:17,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 04:09:17,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201360528] [2022-01-18 04:09:17,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:09:17,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:09:17,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:09:17,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:09:17,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:09:17,390 INFO L87 Difference]: Start difference. First operand 127826 states and 539485 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-18 04:09:21,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:09:21,560 INFO L93 Difference]: Finished difference Result 148843 states and 607252 transitions. [2022-01-18 04:09:21,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 04:09:21,561 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) Word has length 33 [2022-01-18 04:09:21,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:09:22,269 INFO L225 Difference]: With dead ends: 148843 [2022-01-18 04:09:22,269 INFO L226 Difference]: Without dead ends: 146095 [2022-01-18 04:09:22,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 52 SyntacticMatches, 20 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2431 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=967, Invalid=4733, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 04:09:22,270 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 899 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 4517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2754 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:09:22,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 979 Invalid, 4517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1709 Invalid, 0 Unknown, 2754 Unchecked, 1.2s Time] [2022-01-18 04:09:22,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146095 states. [2022-01-18 04:09:26,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146095 to 127965. [2022-01-18 04:09:26,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127965 states, 127964 states have (on average 4.218639617392392) internal successors, (539834), 127964 states have internal predecessors, (539834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127965 states to 127965 states and 539834 transitions. [2022-01-18 04:09:27,775 INFO L78 Accepts]: Start accepts. Automaton has 127965 states and 539834 transitions. Word has length 33 [2022-01-18 04:09:27,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:09:27,775 INFO L470 AbstractCegarLoop]: Abstraction has 127965 states and 539834 transitions. [2022-01-18 04:09:27,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-18 04:09:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 127965 states and 539834 transitions. [2022-01-18 04:09:28,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:09:28,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:09:28,138 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:09:28,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 04:09:28,339 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,SelfDestructingSolverStorable87 [2022-01-18 04:09:28,339 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:09:28,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:09:28,339 INFO L85 PathProgramCache]: Analyzing trace with hash 824311120, now seen corresponding path program 14 times [2022-01-18 04:09:28,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:09:28,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892989973] [2022-01-18 04:09:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:09:28,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:09:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:09:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:28,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:09:28,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892989973] [2022-01-18 04:09:28,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892989973] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:09:28,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141909930] [2022-01-18 04:09:28,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:09:28,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:09:28,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:09:28,517 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) [2022-01-18 04:09:28,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 04:09:28,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:09:28,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:09:28,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:09:28,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:09:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:29,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:09:29,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:09:29,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 04:09:29,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:09:29,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 04:09:29,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:09:29,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:09:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:29,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141909930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:09:29,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:09:29,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 23 [2022-01-18 04:09:29,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420904799] [2022-01-18 04:09:29,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:09:29,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 04:09:29,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:09:29,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 04:09:29,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:09:29,461 INFO L87 Difference]: Start difference. First operand 127965 states and 539834 transitions. Second operand has 24 states, 24 states have (on average 3.625) internal successors, (87), 23 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) [2022-01-18 04:09:32,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:09:32,808 INFO L93 Difference]: Finished difference Result 141886 states and 584113 transitions. [2022-01-18 04:09:32,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 04:09:32,808 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 23 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) Word has length 33 [2022-01-18 04:09:32,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:09:33,416 INFO L225 Difference]: With dead ends: 141886 [2022-01-18 04:09:33,416 INFO L226 Difference]: Without dead ends: 140493 [2022-01-18 04:09:33,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 53 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=660, Invalid=3372, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 04:09:33,416 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 714 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 2206 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 2793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 517 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 04:09:33,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 863 Invalid, 2793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2206 Invalid, 0 Unknown, 517 Unchecked, 0.9s Time] [2022-01-18 04:09:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140493 states. [2022-01-18 04:09:37,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140493 to 127462. [2022-01-18 04:09:37,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127462 states, 127461 states have (on average 4.221479511379951) internal successors, (538074), 127461 states have internal predecessors, (538074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:38,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127462 states to 127462 states and 538074 transitions. [2022-01-18 04:09:38,907 INFO L78 Accepts]: Start accepts. Automaton has 127462 states and 538074 transitions. Word has length 33 [2022-01-18 04:09:38,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:09:38,908 INFO L470 AbstractCegarLoop]: Abstraction has 127462 states and 538074 transitions. [2022-01-18 04:09:38,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 23 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) [2022-01-18 04:09:38,908 INFO L276 IsEmpty]: Start isEmpty. Operand 127462 states and 538074 transitions. [2022-01-18 04:09:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:09:39,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:09:39,149 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:09:39,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-18 04:09:39,349 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,SelfDestructingSolverStorable88 [2022-01-18 04:09:39,349 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:09:39,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:09:39,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1989825946, now seen corresponding path program 7 times [2022-01-18 04:09:39,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:09:39,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510547912] [2022-01-18 04:09:39,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:09:39,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:09:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:09:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:39,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:09:39,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510547912] [2022-01-18 04:09:39,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510547912] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:09:39,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254634476] [2022-01-18 04:09:39,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:09:39,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:09:39,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:09:39,516 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) [2022-01-18 04:09:39,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 04:09:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:09:39,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:09:39,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:09:39,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-01-18 04:09:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:39,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:09:39,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:09:39,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 04:09:39,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:09:39,814 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 04:09:39,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:09:39,818 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 20 treesize of output 24 [2022-01-18 04:09:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:39,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254634476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:09:39,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:09:39,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-01-18 04:09:39,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944776362] [2022-01-18 04:09:39,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:09:39,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:09:39,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:09:39,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:09:39,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:09:39,887 INFO L87 Difference]: Start difference. First operand 127462 states and 538074 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:42,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:09:42,384 INFO L93 Difference]: Finished difference Result 139085 states and 574951 transitions. [2022-01-18 04:09:42,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:09:42,385 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:09:42,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:09:43,032 INFO L225 Difference]: With dead ends: 139085 [2022-01-18 04:09:43,032 INFO L226 Difference]: Without dead ends: 138723 [2022-01-18 04:09:43,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:09:43,033 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 333 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 2159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 04:09:43,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 921 Invalid, 2159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2150 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 04:09:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138723 states. [2022-01-18 04:09:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138723 to 128062. [2022-01-18 04:09:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128062 states, 128061 states have (on average 4.217638469167038) internal successors, (540115), 128061 states have internal predecessors, (540115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128062 states to 128062 states and 540115 transitions. [2022-01-18 04:09:48,368 INFO L78 Accepts]: Start accepts. Automaton has 128062 states and 540115 transitions. Word has length 33 [2022-01-18 04:09:48,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:09:48,369 INFO L470 AbstractCegarLoop]: Abstraction has 128062 states and 540115 transitions. [2022-01-18 04:09:48,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:48,369 INFO L276 IsEmpty]: Start isEmpty. Operand 128062 states and 540115 transitions. [2022-01-18 04:09:48,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:09:48,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:09:48,625 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:09:48,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-01-18 04:09:48,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-01-18 04:09:48,826 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:09:48,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:09:48,826 INFO L85 PathProgramCache]: Analyzing trace with hash -165930146, now seen corresponding path program 8 times [2022-01-18 04:09:48,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:09:48,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798051684] [2022-01-18 04:09:48,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:09:48,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:09:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:09:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:48,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:09:48,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798051684] [2022-01-18 04:09:48,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798051684] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:09:48,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078669563] [2022-01-18 04:09:48,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:09:48,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:09:48,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:09:48,960 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) [2022-01-18 04:09:48,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 04:09:48,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:09:48,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:09:48,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:09:48,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:09:49,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 04:09:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:49,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:09:49,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:09:49,215 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 04:09:49,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:09:49,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 04:09:49,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:09:49,281 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 20 treesize of output 24 [2022-01-18 04:09:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:49,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078669563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:09:49,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:09:49,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-01-18 04:09:49,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046379630] [2022-01-18 04:09:49,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:09:49,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:09:49,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:09:49,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:09:49,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:09:49,355 INFO L87 Difference]: Start difference. First operand 128062 states and 540115 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:52,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:09:52,043 INFO L93 Difference]: Finished difference Result 141288 states and 583034 transitions. [2022-01-18 04:09:52,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 04:09:52,043 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:09:52,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:09:52,733 INFO L225 Difference]: With dead ends: 141288 [2022-01-18 04:09:52,733 INFO L226 Difference]: Without dead ends: 141078 [2022-01-18 04:09:52,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 04:09:52,733 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 382 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 2648 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 2672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 04:09:52,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 978 Invalid, 2672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2648 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 04:09:52,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141078 states. [2022-01-18 04:09:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141078 to 128065. [2022-01-18 04:09:56,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128065 states, 128064 states have (on average 4.217945714642679) internal successors, (540167), 128064 states have internal predecessors, (540167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:58,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128065 states to 128065 states and 540167 transitions. [2022-01-18 04:09:58,187 INFO L78 Accepts]: Start accepts. Automaton has 128065 states and 540167 transitions. Word has length 33 [2022-01-18 04:09:58,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:09:58,187 INFO L470 AbstractCegarLoop]: Abstraction has 128065 states and 540167 transitions. [2022-01-18 04:09:58,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:09:58,187 INFO L276 IsEmpty]: Start isEmpty. Operand 128065 states and 540167 transitions. [2022-01-18 04:09:58,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:09:58,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:09:58,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:09:58,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-18 04:09:58,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:09:58,654 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:09:58,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:09:58,654 INFO L85 PathProgramCache]: Analyzing trace with hash 2057617790, now seen corresponding path program 5 times [2022-01-18 04:09:58,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:09:58,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124768529] [2022-01-18 04:09:58,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:09:58,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:09:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:09:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:58,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:09:58,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124768529] [2022-01-18 04:09:58,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124768529] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:09:58,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662843191] [2022-01-18 04:09:58,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:09:58,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:09:58,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:09:58,892 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) [2022-01-18 04:09:58,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 04:09:58,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:09:58,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:09:58,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 04:09:58,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:09:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:59,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:09:59,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:09:59,578 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 04:09:59,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:09:59,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 04:09:59,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:09:59,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-18 04:09:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:09:59,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662843191] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:09:59,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:09:59,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 04:09:59,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274838008] [2022-01-18 04:09:59,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:09:59,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 04:09:59,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:09:59,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 04:09:59,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:09:59,938 INFO L87 Difference]: Start difference. First operand 128065 states and 540167 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:02,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:10:02,228 INFO L93 Difference]: Finished difference Result 133414 states and 556585 transitions. [2022-01-18 04:10:02,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 04:10:02,228 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:10:02,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:10:02,832 INFO L225 Difference]: With dead ends: 133414 [2022-01-18 04:10:02,833 INFO L226 Difference]: Without dead ends: 132561 [2022-01-18 04:10:02,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 04:10:02,833 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 454 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 04:10:02,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 646 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 04:10:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132561 states. [2022-01-18 04:10:06,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132561 to 127886. [2022-01-18 04:10:06,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127886 states, 127885 states have (on average 4.217922352113226) internal successors, (539409), 127885 states have internal predecessors, (539409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:07,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127886 states to 127886 states and 539409 transitions. [2022-01-18 04:10:07,568 INFO L78 Accepts]: Start accepts. Automaton has 127886 states and 539409 transitions. Word has length 33 [2022-01-18 04:10:07,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:10:07,568 INFO L470 AbstractCegarLoop]: Abstraction has 127886 states and 539409 transitions. [2022-01-18 04:10:07,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:07,568 INFO L276 IsEmpty]: Start isEmpty. Operand 127886 states and 539409 transitions. [2022-01-18 04:10:08,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:10:08,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:10:08,497 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:10:08,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-18 04:10:08,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:08,711 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:10:08,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:10:08,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1353221066, now seen corresponding path program 15 times [2022-01-18 04:10:08,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:10:08,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989480867] [2022-01-18 04:10:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:10:08,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:10:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:10:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:08,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:10:08,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989480867] [2022-01-18 04:10:08,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989480867] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:10:08,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911845674] [2022-01-18 04:10:08,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:10:08,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:08,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:10:08,851 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) [2022-01-18 04:10:08,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 04:10:08,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:10:08,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:10:08,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 04:10:08,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:10:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:09,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:10:09,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:09,459 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 37 treesize of output 39 [2022-01-18 04:10:09,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:09,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 34 [2022-01-18 04:10:09,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:09,662 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 24 treesize of output 28 [2022-01-18 04:10:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:09,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911845674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:10:09,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:10:09,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 04:10:09,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890760511] [2022-01-18 04:10:09,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:10:09,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:10:09,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:10:09,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:10:09,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:10:09,775 INFO L87 Difference]: Start difference. First operand 127886 states and 539409 transitions. Second operand has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 21 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) [2022-01-18 04:10:12,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:10:12,191 INFO L93 Difference]: Finished difference Result 138811 states and 575714 transitions. [2022-01-18 04:10:12,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 04:10:12,192 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 21 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) Word has length 33 [2022-01-18 04:10:12,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:10:12,792 INFO L225 Difference]: With dead ends: 138811 [2022-01-18 04:10:12,792 INFO L226 Difference]: Without dead ends: 138442 [2022-01-18 04:10:12,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=236, Invalid=1324, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 04:10:12,792 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 322 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:10:12,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 786 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1295 Invalid, 0 Unknown, 363 Unchecked, 0.5s Time] [2022-01-18 04:10:12,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138442 states. [2022-01-18 04:10:16,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138442 to 128861. [2022-01-18 04:10:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128861 states, 128860 states have (on average 4.214604997671892) internal successors, (543094), 128860 states have internal predecessors, (543094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:17,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128861 states to 128861 states and 543094 transitions. [2022-01-18 04:10:17,557 INFO L78 Accepts]: Start accepts. Automaton has 128861 states and 543094 transitions. Word has length 33 [2022-01-18 04:10:17,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:10:17,557 INFO L470 AbstractCegarLoop]: Abstraction has 128861 states and 543094 transitions. [2022-01-18 04:10:17,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 21 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) [2022-01-18 04:10:17,557 INFO L276 IsEmpty]: Start isEmpty. Operand 128861 states and 543094 transitions. [2022-01-18 04:10:18,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:10:18,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:10:18,485 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:10:18,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 04:10:18,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:18,703 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:10:18,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:10:18,704 INFO L85 PathProgramCache]: Analyzing trace with hash 461008036, now seen corresponding path program 16 times [2022-01-18 04:10:18,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:10:18,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932967093] [2022-01-18 04:10:18,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:10:18,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:10:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:10:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:18,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:10:18,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932967093] [2022-01-18 04:10:18,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932967093] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:10:18,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176716652] [2022-01-18 04:10:18,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:10:18,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:18,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:10:18,837 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) [2022-01-18 04:10:18,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 04:10:18,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:10:18,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:10:18,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 04:10:18,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:10:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:19,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:10:19,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:19,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 30 [2022-01-18 04:10:19,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:19,578 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 04:10:19,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:19,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 04:10:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:19,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176716652] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:10:19,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:10:19,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 04:10:19,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932124180] [2022-01-18 04:10:19,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:10:19,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:10:19,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:10:19,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:10:19,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:10:19,699 INFO L87 Difference]: Start difference. First operand 128861 states and 543094 transitions. Second operand has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 21 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) [2022-01-18 04:10:22,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:10:22,923 INFO L93 Difference]: Finished difference Result 157766 states and 647507 transitions. [2022-01-18 04:10:22,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 04:10:22,924 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 21 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) Word has length 33 [2022-01-18 04:10:22,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:10:23,648 INFO L225 Difference]: With dead ends: 157766 [2022-01-18 04:10:23,648 INFO L226 Difference]: Without dead ends: 155791 [2022-01-18 04:10:23,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=390, Invalid=2366, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 04:10:23,649 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 515 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 2938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 515 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 04:10:23,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 978 Invalid, 2938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2380 Invalid, 0 Unknown, 515 Unchecked, 0.9s Time] [2022-01-18 04:10:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155791 states. [2022-01-18 04:10:27,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155791 to 127719. [2022-01-18 04:10:28,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127719 states, 127718 states have (on average 4.217079816470662) internal successors, (538597), 127718 states have internal predecessors, (538597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127719 states to 127719 states and 538597 transitions. [2022-01-18 04:10:29,713 INFO L78 Accepts]: Start accepts. Automaton has 127719 states and 538597 transitions. Word has length 33 [2022-01-18 04:10:29,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:10:29,714 INFO L470 AbstractCegarLoop]: Abstraction has 127719 states and 538597 transitions. [2022-01-18 04:10:29,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 21 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) [2022-01-18 04:10:29,714 INFO L276 IsEmpty]: Start isEmpty. Operand 127719 states and 538597 transitions. [2022-01-18 04:10:30,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:10:30,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:10:30,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:10:30,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 04:10:30,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:30,407 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:10:30,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:10:30,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1058243580, now seen corresponding path program 8 times [2022-01-18 04:10:30,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:10:30,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596531220] [2022-01-18 04:10:30,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:10:30,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:10:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:10:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:30,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:10:30,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596531220] [2022-01-18 04:10:30,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596531220] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:10:30,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929501574] [2022-01-18 04:10:30,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:10:30,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:30,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:10:30,584 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) [2022-01-18 04:10:30,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 04:10:30,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:10:30,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:10:30,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:10:30,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:10:30,765 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 15 treesize of output 11 [2022-01-18 04:10:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:30,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:10:30,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:30,900 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 20 treesize of output 24 [2022-01-18 04:10:30,935 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:30,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 04:10:30,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:30,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 04:10:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:31,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929501574] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:10:31,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:10:31,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-01-18 04:10:31,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97820075] [2022-01-18 04:10:31,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:10:31,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:10:31,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:10:31,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:10:31,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:10:31,044 INFO L87 Difference]: Start difference. First operand 127719 states and 538597 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:33,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:10:33,926 INFO L93 Difference]: Finished difference Result 156407 states and 642294 transitions. [2022-01-18 04:10:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 04:10:33,927 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:10:33,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:10:34,655 INFO L225 Difference]: With dead ends: 156407 [2022-01-18 04:10:34,655 INFO L226 Difference]: Without dead ends: 155732 [2022-01-18 04:10:34,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=290, Invalid=1690, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 04:10:34,655 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 277 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:10:34,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 965 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2304 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 04:10:34,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155732 states. [2022-01-18 04:10:38,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155732 to 127513. [2022-01-18 04:10:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127513 states, 127512 states have (on average 4.217752054708576) internal successors, (537814), 127512 states have internal predecessors, (537814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127513 states to 127513 states and 537814 transitions. [2022-01-18 04:10:40,111 INFO L78 Accepts]: Start accepts. Automaton has 127513 states and 537814 transitions. Word has length 33 [2022-01-18 04:10:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:10:40,111 INFO L470 AbstractCegarLoop]: Abstraction has 127513 states and 537814 transitions. [2022-01-18 04:10:40,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:10:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 127513 states and 537814 transitions. [2022-01-18 04:10:40,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:10:40,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:10:40,416 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:10:40,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-01-18 04:10:40,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:40,617 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:10:40,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:10:40,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1067294788, now seen corresponding path program 9 times [2022-01-18 04:10:40,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:10:40,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104374339] [2022-01-18 04:10:40,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:10:40,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:10:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:10:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:10:40,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:10:40,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104374339] [2022-01-18 04:10:40,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104374339] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:10:40,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667452670] [2022-01-18 04:10:40,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:10:40,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:10:40,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:10:40,727 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) [2022-01-18 04:10:40,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 04:10:40,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:10:40,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:10:40,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 04:10:40,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:10:41,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 04:10:41,619 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:10:41,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:10:42,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:42,148 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 20 treesize of output 24 [2022-01-18 04:10:42,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:42,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 04:10:42,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:10:42,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 68 [2022-01-18 04:10:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:10:42,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667452670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:10:42,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:10:42,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 34 [2022-01-18 04:10:42,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745115663] [2022-01-18 04:10:42,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:10:42,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 04:10:42,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:10:42,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 04:10:42,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 04:10:42,948 INFO L87 Difference]: Start difference. First operand 127513 states and 537814 transitions. Second operand has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:11:15,906 INFO L93 Difference]: Finished difference Result 393166 states and 1586517 transitions. [2022-01-18 04:11:15,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 341 states. [2022-01-18 04:11:15,907 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:11:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:11:18,148 INFO L225 Difference]: With dead ends: 393166 [2022-01-18 04:11:18,148 INFO L226 Difference]: Without dead ends: 392969 [2022-01-18 04:11:18,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 73 SyntacticMatches, 29 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54769 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=14554, Invalid=111116, Unknown=0, NotChecked=0, Total=125670 [2022-01-18 04:11:18,152 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 1597 mSDsluCounter, 6888 mSDsCounter, 0 mSdLazyCounter, 7936 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1597 SdHoareTripleChecker+Valid, 4082 SdHoareTripleChecker+Invalid, 17964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 7936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9895 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:11:18,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1597 Valid, 4082 Invalid, 17964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 7936 Invalid, 0 Unknown, 9895 Unchecked, 4.1s Time] [2022-01-18 04:11:19,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392969 states. [2022-01-18 04:11:28,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392969 to 147722. [2022-01-18 04:11:28,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147722 states, 147721 states have (on average 4.259489172155618) internal successors, (629216), 147721 states have internal predecessors, (629216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147722 states to 147722 states and 629216 transitions. [2022-01-18 04:11:29,783 INFO L78 Accepts]: Start accepts. Automaton has 147722 states and 629216 transitions. Word has length 33 [2022-01-18 04:11:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:11:29,783 INFO L470 AbstractCegarLoop]: Abstraction has 147722 states and 629216 transitions. [2022-01-18 04:11:29,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 147722 states and 629216 transitions. [2022-01-18 04:11:30,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:11:30,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:11:30,059 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:11:30,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-01-18 04:11:30,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:30,259 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:11:30,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:11:30,260 INFO L85 PathProgramCache]: Analyzing trace with hash 284439802, now seen corresponding path program 10 times [2022-01-18 04:11:30,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:11:30,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119792338] [2022-01-18 04:11:30,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:11:30,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:11:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:11:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:30,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:11:30,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119792338] [2022-01-18 04:11:30,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119792338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:11:30,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669034490] [2022-01-18 04:11:30,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:11:30,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:30,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:11:30,367 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) [2022-01-18 04:11:30,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 04:11:30,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:11:30,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:11:30,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:11:30,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:11:30,498 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 24 treesize of output 16 [2022-01-18 04:11:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:30,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:11:30,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:11:30,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:11:30,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:11:30,631 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 04:11:30,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:11:30,635 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 24 treesize of output 28 [2022-01-18 04:11:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:30,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669034490] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:11:30,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:11:30,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-01-18 04:11:30,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141093514] [2022-01-18 04:11:30,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:11:30,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:11:30,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:11:30,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:11:30,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:11:30,709 INFO L87 Difference]: Start difference. First operand 147722 states and 629216 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:11:33,467 INFO L93 Difference]: Finished difference Result 159194 states and 665599 transitions. [2022-01-18 04:11:33,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 04:11:33,467 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:11:33,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:11:34,752 INFO L225 Difference]: With dead ends: 159194 [2022-01-18 04:11:34,752 INFO L226 Difference]: Without dead ends: 158619 [2022-01-18 04:11:34,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:11:34,753 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 334 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 2207 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 04:11:34,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 933 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2207 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 04:11:34,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158619 states. [2022-01-18 04:11:39,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158619 to 146459. [2022-01-18 04:11:39,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146459 states, 146458 states have (on average 4.267796911059826) internal successors, (625053), 146458 states have internal predecessors, (625053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:41,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146459 states to 146459 states and 625053 transitions. [2022-01-18 04:11:41,039 INFO L78 Accepts]: Start accepts. Automaton has 146459 states and 625053 transitions. Word has length 33 [2022-01-18 04:11:41,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:11:41,039 INFO L470 AbstractCegarLoop]: Abstraction has 146459 states and 625053 transitions. [2022-01-18 04:11:41,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:41,039 INFO L276 IsEmpty]: Start isEmpty. Operand 146459 states and 625053 transitions. [2022-01-18 04:11:41,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:11:41,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:11:41,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:11:41,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-18 04:11:41,534 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,SelfDestructingSolverStorable96 [2022-01-18 04:11:41,534 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:11:41,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:11:41,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1428166344, now seen corresponding path program 11 times [2022-01-18 04:11:41,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:11:41,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382805641] [2022-01-18 04:11:41,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:11:41,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:11:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:11:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:41,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:11:41,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382805641] [2022-01-18 04:11:41,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382805641] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:11:41,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196432263] [2022-01-18 04:11:41,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:11:41,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:41,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:11:41,629 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) [2022-01-18 04:11:41,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 04:11:41,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 04:11:41,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:11:41,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:11:41,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:11:41,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:11:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:41,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:11:41,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:11:41,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 04:11:41,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:11:41,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 04:11:41,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:11:41,896 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 04:11:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:41,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196432263] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:11:41,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:11:41,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-01-18 04:11:41,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117404022] [2022-01-18 04:11:41,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:11:41,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:11:41,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:11:41,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:11:41,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:11:41,971 INFO L87 Difference]: Start difference. First operand 146459 states and 625053 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:44,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:11:44,616 INFO L93 Difference]: Finished difference Result 159231 states and 668684 transitions. [2022-01-18 04:11:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 04:11:44,617 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:11:44,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:11:45,348 INFO L225 Difference]: With dead ends: 159231 [2022-01-18 04:11:45,349 INFO L226 Difference]: Without dead ends: 159231 [2022-01-18 04:11:45,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 04:11:45,349 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 443 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 04:11:45,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 821 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 04:11:46,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159231 states. [2022-01-18 04:11:50,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159231 to 147041. [2022-01-18 04:11:50,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147041 states, 147040 states have (on average 4.266145266594124) internal successors, (627294), 147040 states have internal predecessors, (627294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:51,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147041 states to 147041 states and 627294 transitions. [2022-01-18 04:11:51,999 INFO L78 Accepts]: Start accepts. Automaton has 147041 states and 627294 transitions. Word has length 33 [2022-01-18 04:11:51,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:11:51,999 INFO L470 AbstractCegarLoop]: Abstraction has 147041 states and 627294 transitions. [2022-01-18 04:11:51,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:51,999 INFO L276 IsEmpty]: Start isEmpty. Operand 147041 states and 627294 transitions. [2022-01-18 04:11:52,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:11:52,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:11:52,343 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:11:52,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 04:11:52,543 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,SelfDestructingSolverStorable97 [2022-01-18 04:11:52,543 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:11:52,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:11:52,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1783853826, now seen corresponding path program 9 times [2022-01-18 04:11:52,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:11:52,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906037096] [2022-01-18 04:11:52,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:11:52,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:11:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:11:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:52,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:11:52,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906037096] [2022-01-18 04:11:52,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906037096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:11:52,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942499768] [2022-01-18 04:11:52,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:11:52,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:11:52,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:11:52,645 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) [2022-01-18 04:11:52,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 04:11:52,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 04:11:52,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:11:52,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:11:52,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:11:52,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-18 04:11:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:52,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:11:52,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:11:52,871 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 04:11:52,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:11:52,922 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 24 treesize of output 28 [2022-01-18 04:11:52,926 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:11:52,927 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 04:11:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:11:53,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942499768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:11:53,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:11:53,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-01-18 04:11:53,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459415740] [2022-01-18 04:11:53,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:11:53,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:11:53,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:11:53,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:11:53,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:11:53,005 INFO L87 Difference]: Start difference. First operand 147041 states and 627294 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:11:55,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:11:55,577 INFO L93 Difference]: Finished difference Result 164681 states and 684514 transitions. [2022-01-18 04:11:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 04:11:55,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:11:55,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:11:56,351 INFO L225 Difference]: With dead ends: 164681 [2022-01-18 04:11:56,351 INFO L226 Difference]: Without dead ends: 164165 [2022-01-18 04:11:56,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 04:11:56,351 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 453 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 04:11:56,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 788 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1919 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 04:11:56,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164165 states. [2022-01-18 04:12:01,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164165 to 146174. [2022-01-18 04:12:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146174 states, 146173 states have (on average 4.270453503725038) internal successors, (624225), 146173 states have internal predecessors, (624225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:02,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146174 states to 146174 states and 624225 transitions. [2022-01-18 04:12:02,388 INFO L78 Accepts]: Start accepts. Automaton has 146174 states and 624225 transitions. Word has length 33 [2022-01-18 04:12:02,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:12:02,388 INFO L470 AbstractCegarLoop]: Abstraction has 146174 states and 624225 transitions. [2022-01-18 04:12:02,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:02,388 INFO L276 IsEmpty]: Start isEmpty. Operand 146174 states and 624225 transitions. [2022-01-18 04:12:03,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:12:03,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:12:03,347 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:12:03,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-01-18 04:12:03,563 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,SelfDestructingSolverStorable98 [2022-01-18 04:12:03,563 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:12:03,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:12:03,564 INFO L85 PathProgramCache]: Analyzing trace with hash -472347488, now seen corresponding path program 10 times [2022-01-18 04:12:03,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:12:03,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040205310] [2022-01-18 04:12:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:12:03,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:12:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:12:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:03,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:12:03,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040205310] [2022-01-18 04:12:03,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040205310] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:12:03,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756549019] [2022-01-18 04:12:03,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:12:03,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:12:03,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:12:03,676 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) [2022-01-18 04:12:03,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 04:12:03,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:12:03,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:12:03,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:12:03,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:12:03,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:12:03,884 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:03,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:12:03,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:12:03,905 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 16 treesize of output 20 [2022-01-18 04:12:03,952 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:12:03,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 04:12:03,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:12:03,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 04:12:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:04,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756549019] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:12:04,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:12:04,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-01-18 04:12:04,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342533401] [2022-01-18 04:12:04,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:12:04,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:12:04,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:12:04,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:12:04,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:12:04,032 INFO L87 Difference]: Start difference. First operand 146174 states and 624225 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:06,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:12:06,906 INFO L93 Difference]: Finished difference Result 169413 states and 705268 transitions. [2022-01-18 04:12:06,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 04:12:06,906 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:12:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:12:07,693 INFO L225 Difference]: With dead ends: 169413 [2022-01-18 04:12:07,694 INFO L226 Difference]: Without dead ends: 168733 [2022-01-18 04:12:07,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=1278, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 04:12:07,694 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 355 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 2882 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 2903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:12:07,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 1121 Invalid, 2903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2882 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 04:12:07,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168733 states. [2022-01-18 04:12:13,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168733 to 145082. [2022-01-18 04:12:13,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145082 states, 145081 states have (on average 4.268374218539988) internal successors, (619260), 145081 states have internal predecessors, (619260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145082 states to 145082 states and 619260 transitions. [2022-01-18 04:12:14,618 INFO L78 Accepts]: Start accepts. Automaton has 145082 states and 619260 transitions. Word has length 33 [2022-01-18 04:12:14,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:12:14,618 INFO L470 AbstractCegarLoop]: Abstraction has 145082 states and 619260 transitions. [2022-01-18 04:12:14,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:14,619 INFO L276 IsEmpty]: Start isEmpty. Operand 145082 states and 619260 transitions. [2022-01-18 04:12:14,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:12:14,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:12:14,869 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:12:14,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-18 04:12:15,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:12:15,070 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:12:15,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:12:15,071 INFO L85 PathProgramCache]: Analyzing trace with hash -805336814, now seen corresponding path program 12 times [2022-01-18 04:12:15,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:12:15,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932297738] [2022-01-18 04:12:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:12:15,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:12:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:12:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:15,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:12:15,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932297738] [2022-01-18 04:12:15,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932297738] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:12:15,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783257059] [2022-01-18 04:12:15,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:12:15,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:12:15,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:12:15,177 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) [2022-01-18 04:12:15,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 04:12:15,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 04:12:15,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:12:15,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:12:15,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:12:15,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 04:12:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:15,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:12:15,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:12:15,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 04:12:15,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:12:15,407 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:12:15,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:12:15,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:12:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:15,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783257059] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:12:15,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:12:15,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 14 [2022-01-18 04:12:15,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750090689] [2022-01-18 04:12:15,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:12:15,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:12:15,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:12:15,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:12:15,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:12:15,510 INFO L87 Difference]: Start difference. First operand 145082 states and 619260 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:17,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:12:17,992 INFO L93 Difference]: Finished difference Result 155615 states and 655049 transitions. [2022-01-18 04:12:17,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 04:12:17,993 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 04:12:17,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:12:19,276 INFO L225 Difference]: With dead ends: 155615 [2022-01-18 04:12:19,276 INFO L226 Difference]: Without dead ends: 155615 [2022-01-18 04:12:19,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:12:19,277 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 401 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:12:19,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 689 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 04:12:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155615 states. [2022-01-18 04:12:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155615 to 145440. [2022-01-18 04:12:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145440 states, 145439 states have (on average 4.267521091316635) internal successors, (620664), 145439 states have internal predecessors, (620664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:25,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145440 states to 145440 states and 620664 transitions. [2022-01-18 04:12:25,437 INFO L78 Accepts]: Start accepts. Automaton has 145440 states and 620664 transitions. Word has length 33 [2022-01-18 04:12:25,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:12:25,437 INFO L470 AbstractCegarLoop]: Abstraction has 145440 states and 620664 transitions. [2022-01-18 04:12:25,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:12:25,437 INFO L276 IsEmpty]: Start isEmpty. Operand 145440 states and 620664 transitions. [2022-01-18 04:12:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 04:12:25,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:12:25,737 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:12:25,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-01-18 04:12:25,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:12:25,938 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:12:25,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:12:25,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1491631234, now seen corresponding path program 11 times [2022-01-18 04:12:25,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:12:25,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693988721] [2022-01-18 04:12:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:12:25,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:12:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:12:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:26,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:12:26,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693988721] [2022-01-18 04:12:26,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693988721] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:12:26,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654477433] [2022-01-18 04:12:26,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:12:26,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:12:26,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:12:26,076 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) [2022-01-18 04:12:26,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 04:12:26,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:12:26,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:12:26,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:12:26,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:12:26,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:12:26,247 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 16 treesize of output 12 [2022-01-18 04:12:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:26,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:12:26,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:12:26,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 04:12:26,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:12:26,390 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 04:12:26,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:12:26,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 04:12:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:12:26,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654477433] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:12:26,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:12:26,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2022-01-18 04:12:26,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107779518] [2022-01-18 04:12:26,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:12:26,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:12:26,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:12:26,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:12:26,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:12:26,511 INFO L87 Difference]: Start difference. First operand 145440 states and 620664 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-01-18 04:12:28,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 04:12:28,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:12:28,310 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 312 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 04:12:28,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 576 Invalid, 1761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1493 Invalid, 0 Unknown, 251 Unchecked, 0.6s Time] [2022-01-18 04:12:28,311 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 04:12:28,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-18 04:12:28,337 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 04:12:28,351 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 [2022-01-18 04:12:28,527 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,SelfDestructingSolverStorable101 [2022-01-18 04:12:28,528 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (145440states) and FLOYD_HOARE automaton (currently 26 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (79798 states constructed, input type IntersectNwa). [2022-01-18 04:12:28,529 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 04:12:28,530 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 04:12:28,530 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 04:12:28,533 INFO L732 BasicCegarLoop]: Path program histogram: [25, 16, 12, 11, 6, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-01-18 04:12:28,535 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 04:12:28,535 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 04:12:28,537 INFO L202 PluginConnector]: Adding new model array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 04:12:28 BasicIcfg [2022-01-18 04:12:28,537 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 04:12:28,537 INFO L158 Benchmark]: Toolchain (without parser) took 661126.29ms. Allocated memory was 371.2MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 333.5MB in the beginning and 12.8GB in the end (delta: -12.5GB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. [2022-01-18 04:12:28,537 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 371.2MB. Free memory was 334.7MB in the beginning and 334.6MB in the end (delta: 162.3kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 04:12:28,537 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.22ms. Allocated memory is still 371.2MB. Free memory was 333.5MB in the beginning and 331.9MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 04:12:28,537 INFO L158 Benchmark]: Boogie Preprocessor took 30.20ms. Allocated memory is still 371.2MB. Free memory was 331.9MB in the beginning and 330.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 04:12:28,537 INFO L158 Benchmark]: RCFGBuilder took 274.03ms. Allocated memory is still 371.2MB. Free memory was 330.8MB in the beginning and 321.3MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 04:12:28,537 INFO L158 Benchmark]: TraceAbstraction took 660788.26ms. Allocated memory was 371.2MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 320.8MB in the beginning and 12.8GB in the end (delta: -12.5GB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. [2022-01-18 04:12:28,538 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 371.2MB. Free memory was 334.7MB in the beginning and 334.6MB in the end (delta: 162.3kB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 28.22ms. Allocated memory is still 371.2MB. Free memory was 333.5MB in the beginning and 331.9MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 30.20ms. Allocated memory is still 371.2MB. Free memory was 331.9MB in the beginning and 330.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 274.03ms. Allocated memory is still 371.2MB. Free memory was 330.8MB in the beginning and 321.3MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 660788.26ms. Allocated memory was 371.2MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 320.8MB in the beginning and 12.8GB in the end (delta: -12.5GB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 78]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (145440states) and FLOYD_HOARE automaton (currently 26 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (79798 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (145440states) and FLOYD_HOARE automaton (currently 26 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (79798 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (145440states) and FLOYD_HOARE automaton (currently 26 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (79798 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (145440states) and FLOYD_HOARE automaton (currently 26 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (79798 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 51 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 660.7s, OverallIterations: 102, TraceHistogramMax: 3, PathProgramHistogramMax: 25, EmptinessCheckTime: 16.4s, AutomataDifference: 294.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 44683 SdHoareTripleChecker+Valid, 74.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 44683 mSDsluCounter, 70078 SdHoareTripleChecker+Invalid, 61.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 28902 IncrementalHoareTripleChecker+Unchecked, 97063 mSDsCounter, 4039 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 170969 IncrementalHoareTripleChecker+Invalid, 203910 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4039 mSolverCounterUnsat, 6700 mSDtfsCounter, 170969 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9301 GetRequests, 4475 SyntacticMatches, 295 SemanticMatches, 4531 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226692 ImplicationChecksByTransitivity, 119.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=147722occurred in iteration=96, InterpolantAutomatonStates: 3976, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 255.6s AutomataMinimizationTime, 101 MinimizatonAttempts, 1598238 StatesRemovedByMinimization, 99 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 70.9s InterpolantComputationTime, 5733 NumberOfCodeBlocks, 5718 NumberOfCodeBlocksAsserted, 318 NumberOfCheckSat, 8194 ConstructedInterpolants, 393 QuantifiedInterpolants, 127518 SizeOfPredicates, 972 NumberOfNonLiveVariables, 7271 ConjunctsInSsa, 1367 ConjunctsInUnsatCore, 287 InterpolantComputations, 10 PerfectInterpolantSequences, 609/2894 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