/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/seq-3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 15:46:20,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 15:46:20,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 15:46:20,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 15:46:20,510 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-02-14 15:46:20,544 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 15:46:20,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 15:46:20,545 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-14 15:46:20,545 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-14 15:46:20,546 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-14 15:46:20,546 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-14 15:46:20,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-14 15:46:20,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-14 15:46:20,547 INFO L138 SettingsManager]: * Use SBE=true [2022-02-14 15:46:20,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 15:46:20,548 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 15:46:20,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 15:46:20,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 15:46:20,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 15:46:20,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 15:46:20,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 15:46:20,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 15:46:20,549 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 15:46:20,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 15:46:20,549 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 15:46:20,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 15:46:20,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 15:46:20,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 15:46:20,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 15:46:20,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 15:46:20,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 15:46:20,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-14 15:46:20,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-14 15:46:20,550 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 15:46:20,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-14 15:46:20,550 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-14 15:46:20,551 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-14 15:46:20,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-14 15:46:20,551 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 15:46:20,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 15:46:20,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 15:46:20,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 15:46:20,757 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 15:46:20,758 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 15:46:20,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/seq-3.i [2022-02-14 15:46:20,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e44739338/4b2ae8d68d1346b6bfffcbc9b1e9a04d/FLAGd10f32ac2 [2022-02-14 15:46:21,199 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 15:46:21,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq-3.i [2022-02-14 15:46:21,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e44739338/4b2ae8d68d1346b6bfffcbc9b1e9a04d/FLAGd10f32ac2 [2022-02-14 15:46:21,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e44739338/4b2ae8d68d1346b6bfffcbc9b1e9a04d [2022-02-14 15:46:21,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 15:46:21,221 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-14 15:46:21,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 15:46:21,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 15:46:21,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 15:46:21,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 03:46:21" (1/1) ... [2022-02-14 15:46:21,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@692a1f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:46:21, skipping insertion in model container [2022-02-14 15:46:21,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 03:46:21" (1/1) ... [2022-02-14 15:46:21,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 15:46:21,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 15:46:21,372 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq-3.i[893,906] [2022-02-14 15:46:21,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 15:46:21,407 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 15:46:21,416 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq-3.i[893,906] [2022-02-14 15:46:21,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 15:46:21,430 INFO L208 MainTranslator]: Completed translation [2022-02-14 15:46:21,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:46:21 WrapperNode [2022-02-14 15:46:21,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 15:46:21,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 15:46:21,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 15:46:21,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 15:46:21,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:46:21" (1/1) ... [2022-02-14 15:46:21,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:46:21" (1/1) ... [2022-02-14 15:46:21,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:46:21" (1/1) ... [2022-02-14 15:46:21,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:46:21" (1/1) ... [2022-02-14 15:46:21,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:46:21" (1/1) ... [2022-02-14 15:46:21,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:46:21" (1/1) ... [2022-02-14 15:46:21,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:46:21" (1/1) ... [2022-02-14 15:46:21,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 15:46:21,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 15:46:21,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 15:46:21,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 15:46:21,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:46:21" (1/1) ... [2022-02-14 15:46:21,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 15:46:21,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:21,512 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-14 15:46:21,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-14 15:46:21,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 15:46:21,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 15:46:21,557 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 15:46:21,558 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 15:46:21,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 15:46:21,560 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 15:46:21,560 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 15:46:21,560 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 15:46:21,560 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-14 15:46:21,560 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-14 15:46:21,560 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 15:46:21,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 15:46:21,561 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 15:46:21,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 15:46:21,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 15:46:21,561 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 15:46:21,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 15:46:21,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 15:46:21,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 15:46:21,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 15:46:21,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 15:46:21,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 15:46:21,638 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 15:46:21,639 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 15:46:21,769 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 15:46:21,773 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 15:46:21,773 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-14 15:46:21,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 03:46:21 BoogieIcfgContainer [2022-02-14 15:46:21,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 15:46:21,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 15:46:21,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 15:46:21,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 15:46:21,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 03:46:21" (1/3) ... [2022-02-14 15:46:21,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c8b4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 03:46:21, skipping insertion in model container [2022-02-14 15:46:21,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:46:21" (2/3) ... [2022-02-14 15:46:21,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c8b4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 03:46:21, skipping insertion in model container [2022-02-14 15:46:21,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 03:46:21" (3/3) ... [2022-02-14 15:46:21,794 INFO L111 eAbstractionObserver]: Analyzing ICFG seq-3.i [2022-02-14 15:46:21,799 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-14 15:46:21,799 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 15:46:21,848 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 15:46:21,853 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 15:46:21,853 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 15:46:21,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 15:46:21,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-14 15:46:21,871 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:21,871 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:21,872 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:21,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:21,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1545358454, now seen corresponding path program 1 times [2022-02-14 15:46:21,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:21,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286769674] [2022-02-14 15:46:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:21,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:22,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:46:22,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:22,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286769674] [2022-02-14 15:46:22,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286769674] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 15:46:22,051 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 15:46:22,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 15:46:22,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138002332] [2022-02-14 15:46:22,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 15:46:22,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 15:46:22,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:22,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 15:46:22,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 15:46:22,081 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 15:46:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:22,109 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2022-02-14 15:46:22,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 15:46:22,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-14 15:46:22,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:22,119 INFO L225 Difference]: With dead ends: 41 [2022-02-14 15:46:22,119 INFO L226 Difference]: Without dead ends: 21 [2022-02-14 15:46:22,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 15:46:22,125 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:22,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 15:46:22,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-14 15:46:22,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-02-14 15:46:22,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 15:46:22,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-02-14 15:46:22,149 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2022-02-14 15:46:22,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:22,149 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-02-14 15:46:22,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 15:46:22,150 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-02-14 15:46:22,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-14 15:46:22,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:22,151 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:22,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 15:46:22,151 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:22,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:22,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1389492102, now seen corresponding path program 1 times [2022-02-14 15:46:22,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:22,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211410603] [2022-02-14 15:46:22,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:22,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:22,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:46:22,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:22,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211410603] [2022-02-14 15:46:22,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211410603] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 15:46:22,273 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 15:46:22,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-14 15:46:22,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598060538] [2022-02-14 15:46:22,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 15:46:22,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 15:46:22,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:22,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 15:46:22,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-02-14 15:46:22,276 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 15:46:22,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:22,431 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-02-14 15:46:22,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 15:46:22,431 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-14 15:46:22,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:22,433 INFO L225 Difference]: With dead ends: 40 [2022-02-14 15:46:22,434 INFO L226 Difference]: Without dead ends: 29 [2022-02-14 15:46:22,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-02-14 15:46:22,436 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:22,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 41 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 15:46:22,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-14 15:46:22,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-02-14 15:46:22,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 15:46:22,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-02-14 15:46:22,445 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-02-14 15:46:22,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:22,445 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-02-14 15:46:22,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 15:46:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-02-14 15:46:22,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-14 15:46:22,446 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:22,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:22,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 15:46:22,447 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:22,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:22,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1362943620, now seen corresponding path program 1 times [2022-02-14 15:46:22,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:22,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983158255] [2022-02-14 15:46:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:22,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:22,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:46:22,530 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:22,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983158255] [2022-02-14 15:46:22,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983158255] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:22,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354407744] [2022-02-14 15:46:22,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:22,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:22,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:22,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:22,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 15:46:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:22,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-14 15:46:22,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:46:22,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 15:46:22,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354407744] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 15:46:22,732 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 15:46:22,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2022-02-14 15:46:22,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156085684] [2022-02-14 15:46:22,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 15:46:22,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 15:46:22,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:22,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 15:46:22,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-14 15:46:22,734 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 15:46:22,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:22,792 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-02-14 15:46:22,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 15:46:22,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-14 15:46:22,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:22,795 INFO L225 Difference]: With dead ends: 36 [2022-02-14 15:46:22,795 INFO L226 Difference]: Without dead ends: 34 [2022-02-14 15:46:22,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-14 15:46:22,797 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:22,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 78 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 15:46:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-14 15:46:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2022-02-14 15:46:22,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 15:46:22,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-02-14 15:46:22,810 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2022-02-14 15:46:22,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:22,811 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-02-14 15:46:22,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 15:46:22,811 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-02-14 15:46:22,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-14 15:46:22,812 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:22,812 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] [2022-02-14 15:46:22,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:23,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:23,032 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:23,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:23,032 INFO L85 PathProgramCache]: Analyzing trace with hash 813532579, now seen corresponding path program 1 times [2022-02-14 15:46:23,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:23,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508537833] [2022-02-14 15:46:23,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:23,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:23,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:23,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-14 15:46:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:46:23,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:23,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508537833] [2022-02-14 15:46:23,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508537833] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:23,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75900728] [2022-02-14 15:46:23,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:23,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:23,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:23,184 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:23,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 15:46:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:23,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-14 15:46:23,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:46:23,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:23,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:46:23,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75900728] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:23,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:23,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-02-14 15:46:23,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783313592] [2022-02-14 15:46:23,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:23,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-14 15:46:23,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:23,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-14 15:46:23,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-02-14 15:46:23,499 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 15:46:23,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:23,736 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-02-14 15:46:23,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-14 15:46:23,737 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-02-14 15:46:23,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:23,741 INFO L225 Difference]: With dead ends: 61 [2022-02-14 15:46:23,741 INFO L226 Difference]: Without dead ends: 47 [2022-02-14 15:46:23,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2022-02-14 15:46:23,744 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:23,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 57 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 15:46:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-14 15:46:23,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2022-02-14 15:46:23,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 15:46:23,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-02-14 15:46:23,753 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 25 [2022-02-14 15:46:23,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:23,753 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-02-14 15:46:23,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 15:46:23,753 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-02-14 15:46:23,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-14 15:46:23,754 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:23,754 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] [2022-02-14 15:46:23,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:23,977 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,SelfDestructingSolverStorable3 [2022-02-14 15:46:23,977 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:23,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:23,978 INFO L85 PathProgramCache]: Analyzing trace with hash 21739812, now seen corresponding path program 1 times [2022-02-14 15:46:23,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:23,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679352203] [2022-02-14 15:46:23,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:23,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:24,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:24,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-14 15:46:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:46:24,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:24,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679352203] [2022-02-14 15:46:24,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679352203] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:24,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955829182] [2022-02-14 15:46:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:24,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:24,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:24,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:24,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 15:46:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:24,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-14 15:46:24,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:46:24,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:46:24,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955829182] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:24,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:24,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-14 15:46:24,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157973119] [2022-02-14 15:46:24,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:24,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 15:46:24,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:24,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 15:46:24,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-02-14 15:46:24,350 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 15:46:24,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:24,550 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-02-14 15:46:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 15:46:24,550 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-02-14 15:46:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:24,551 INFO L225 Difference]: With dead ends: 55 [2022-02-14 15:46:24,551 INFO L226 Difference]: Without dead ends: 41 [2022-02-14 15:46:24,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2022-02-14 15:46:24,553 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:24,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 63 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 15:46:24,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-14 15:46:24,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-02-14 15:46:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 15:46:24,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-02-14 15:46:24,560 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 25 [2022-02-14 15:46:24,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:24,561 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-02-14 15:46:24,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 15:46:24,561 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-02-14 15:46:24,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-14 15:46:24,561 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:24,562 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] [2022-02-14 15:46:24,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:24,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:24,776 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:24,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:24,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1131901279, now seen corresponding path program 2 times [2022-02-14 15:46:24,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:24,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596678067] [2022-02-14 15:46:24,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:24,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:24,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:24,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 15:46:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:46:24,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:24,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596678067] [2022-02-14 15:46:24,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596678067] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:24,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074937360] [2022-02-14 15:46:24,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:46:24,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:24,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:24,852 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:24,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 15:46:24,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:46:24,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:24,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 15:46:24,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:46:24,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:46:25,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074937360] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:25,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:25,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2022-02-14 15:46:25,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071622196] [2022-02-14 15:46:25,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:25,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 15:46:25,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:25,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 15:46:25,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-14 15:46:25,028 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 15:46:25,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:25,175 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-02-14 15:46:25,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 15:46:25,175 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-02-14 15:46:25,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:25,178 INFO L225 Difference]: With dead ends: 46 [2022-02-14 15:46:25,178 INFO L226 Difference]: Without dead ends: 44 [2022-02-14 15:46:25,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-02-14 15:46:25,180 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:25,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 43 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 15:46:25,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-14 15:46:25,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-02-14 15:46:25,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 15:46:25,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-02-14 15:46:25,194 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 26 [2022-02-14 15:46:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:25,194 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-02-14 15:46:25,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 15:46:25,194 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-02-14 15:46:25,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-14 15:46:25,195 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:25,195 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:25,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:25,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:25,415 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:25,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:25,416 INFO L85 PathProgramCache]: Analyzing trace with hash 506325734, now seen corresponding path program 3 times [2022-02-14 15:46:25,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:25,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118861330] [2022-02-14 15:46:25,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:25,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:25,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:25,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 15:46:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:25,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 15:46:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 15:46:25,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:25,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118861330] [2022-02-14 15:46:25,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118861330] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:25,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062754376] [2022-02-14 15:46:25,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:46:25,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:25,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:25,531 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:25,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 15:46:25,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-14 15:46:25,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:25,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-14 15:46:25,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 15:46:25,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 15:46:25,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062754376] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:25,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:25,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2022-02-14 15:46:25,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898842925] [2022-02-14 15:46:25,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:25,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-14 15:46:25,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:25,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-14 15:46:25,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-14 15:46:25,846 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 15:46:26,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:26,163 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2022-02-14 15:46:26,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-14 15:46:26,163 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 33 [2022-02-14 15:46:26,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:26,164 INFO L225 Difference]: With dead ends: 91 [2022-02-14 15:46:26,164 INFO L226 Difference]: Without dead ends: 74 [2022-02-14 15:46:26,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2022-02-14 15:46:26,166 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 90 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:26,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 68 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:46:26,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-14 15:46:26,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 41. [2022-02-14 15:46:26,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 32 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 15:46:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-02-14 15:46:26,174 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 33 [2022-02-14 15:46:26,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:26,174 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-02-14 15:46:26,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 15:46:26,175 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-02-14 15:46:26,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-14 15:46:26,175 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:26,175 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:26,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:26,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:26,399 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:26,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:26,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1643645883, now seen corresponding path program 1 times [2022-02-14 15:46:26,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:26,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339357706] [2022-02-14 15:46:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:26,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:26,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:26,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 15:46:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:26,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 15:46:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 15:46:26,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:26,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339357706] [2022-02-14 15:46:26,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339357706] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:26,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599876361] [2022-02-14 15:46:26,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:26,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:26,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:26,526 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:26,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 15:46:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:26,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-14 15:46:26,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 15:46:26,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 15:46:26,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599876361] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:26,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:26,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 21 [2022-02-14 15:46:26,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753420544] [2022-02-14 15:46:26,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:26,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-14 15:46:26,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:26,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-14 15:46:26,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-14 15:46:26,807 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 15:46:27,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:27,069 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-02-14 15:46:27,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-14 15:46:27,070 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 33 [2022-02-14 15:46:27,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:27,071 INFO L225 Difference]: With dead ends: 82 [2022-02-14 15:46:27,071 INFO L226 Difference]: Without dead ends: 65 [2022-02-14 15:46:27,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2022-02-14 15:46:27,072 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 79 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:27,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 68 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 15:46:27,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-14 15:46:27,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2022-02-14 15:46:27,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 32 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 15:46:27,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-02-14 15:46:27,079 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 33 [2022-02-14 15:46:27,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:27,079 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-02-14 15:46:27,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 15:46:27,080 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-02-14 15:46:27,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-14 15:46:27,080 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:27,080 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:27,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:27,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:27,304 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:27,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:27,304 INFO L85 PathProgramCache]: Analyzing trace with hash 426710726, now seen corresponding path program 2 times [2022-02-14 15:46:27,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:27,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597834395] [2022-02-14 15:46:27,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:27,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:27,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:27,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 15:46:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:27,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 15:46:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 15:46:27,409 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:27,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597834395] [2022-02-14 15:46:27,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597834395] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:27,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041591232] [2022-02-14 15:46:27,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:46:27,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:27,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:27,411 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:27,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 15:46:27,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:46:27,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:27,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-14 15:46:27,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 15:46:27,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 15:46:27,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041591232] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:27,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:27,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-02-14 15:46:27,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955945411] [2022-02-14 15:46:27,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:27,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-14 15:46:27,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:27,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-14 15:46:27,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-02-14 15:46:27,726 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 15:46:27,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:27,973 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2022-02-14 15:46:27,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-14 15:46:27,974 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 33 [2022-02-14 15:46:27,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:27,975 INFO L225 Difference]: With dead ends: 72 [2022-02-14 15:46:27,975 INFO L226 Difference]: Without dead ends: 55 [2022-02-14 15:46:27,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2022-02-14 15:46:27,976 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:27,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 74 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 15:46:27,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-14 15:46:27,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2022-02-14 15:46:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 15:46:27,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-02-14 15:46:27,983 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 33 [2022-02-14 15:46:27,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:27,983 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-02-14 15:46:27,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 15:46:27,983 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-02-14 15:46:27,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-14 15:46:27,984 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:27,984 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:28,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:28,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:28,185 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:28,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:28,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1365830172, now seen corresponding path program 4 times [2022-02-14 15:46:28,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:28,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128287685] [2022-02-14 15:46:28,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:28,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:28,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:28,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-14 15:46:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:28,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:46:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 15:46:28,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:28,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128287685] [2022-02-14 15:46:28,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128287685] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:28,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274641514] [2022-02-14 15:46:28,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:46:28,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:28,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:28,256 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:28,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 15:46:28,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:46:28,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:28,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 15:46:28,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 15:46:28,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 15:46:28,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274641514] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:28,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:28,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-02-14 15:46:28,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520043064] [2022-02-14 15:46:28,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:28,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 15:46:28,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:28,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 15:46:28,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-14 15:46:28,462 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 15:46:28,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:28,595 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-02-14 15:46:28,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 15:46:28,596 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2022-02-14 15:46:28,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:28,596 INFO L225 Difference]: With dead ends: 56 [2022-02-14 15:46:28,597 INFO L226 Difference]: Without dead ends: 54 [2022-02-14 15:46:28,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-02-14 15:46:28,597 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:28,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 50 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 15:46:28,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-14 15:46:28,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2022-02-14 15:46:28,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-14 15:46:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-02-14 15:46:28,605 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 34 [2022-02-14 15:46:28,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:28,605 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-02-14 15:46:28,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 15:46:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-02-14 15:46:28,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-14 15:46:28,606 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:28,606 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:28,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:28,819 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,SelfDestructingSolverStorable9 [2022-02-14 15:46:28,819 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:28,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:28,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1324892739, now seen corresponding path program 5 times [2022-02-14 15:46:28,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:28,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068897336] [2022-02-14 15:46:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:28,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:28,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:28,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-14 15:46:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:28,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:46:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:28,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 15:46:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 15:46:28,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:28,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068897336] [2022-02-14 15:46:28,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068897336] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:28,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815895345] [2022-02-14 15:46:28,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:46:28,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:28,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:28,938 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:28,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 15:46:28,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-14 15:46:28,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:28,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 15:46:28,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 15:46:29,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 15:46:29,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815895345] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:29,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:29,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 23 [2022-02-14 15:46:29,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576938529] [2022-02-14 15:46:29,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:29,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-14 15:46:29,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:29,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-14 15:46:29,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-02-14 15:46:29,291 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:46:29,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:29,688 INFO L93 Difference]: Finished difference Result 128 states and 158 transitions. [2022-02-14 15:46:29,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-14 15:46:29,688 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 41 [2022-02-14 15:46:29,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:29,690 INFO L225 Difference]: With dead ends: 128 [2022-02-14 15:46:29,690 INFO L226 Difference]: Without dead ends: 108 [2022-02-14 15:46:29,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=1234, Unknown=0, NotChecked=0, Total=1560 [2022-02-14 15:46:29,691 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 111 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:29,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 81 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:46:29,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-14 15:46:29,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 51. [2022-02-14 15:46:29,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 40 states have internal predecessors, (46), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-14 15:46:29,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-02-14 15:46:29,702 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 41 [2022-02-14 15:46:29,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:29,702 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-02-14 15:46:29,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:46:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-02-14 15:46:29,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-14 15:46:29,703 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:29,703 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:29,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:29,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:29,919 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:29,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:29,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1660829692, now seen corresponding path program 2 times [2022-02-14 15:46:29,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:29,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663933243] [2022-02-14 15:46:29,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:29,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:30,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:30,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-14 15:46:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:30,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:46:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:30,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 15:46:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 15:46:30,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:30,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663933243] [2022-02-14 15:46:30,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663933243] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:30,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52978756] [2022-02-14 15:46:30,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:46:30,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:30,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:30,050 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:30,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-14 15:46:30,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:46:30,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:30,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 15:46:30,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 15:46:30,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 15:46:30,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52978756] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:30,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:30,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 24 [2022-02-14 15:46:30,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228451755] [2022-02-14 15:46:30,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:30,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-14 15:46:30,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:30,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-14 15:46:30,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-02-14 15:46:30,431 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:46:30,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:30,833 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2022-02-14 15:46:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-14 15:46:30,835 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 41 [2022-02-14 15:46:30,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:30,837 INFO L225 Difference]: With dead ends: 116 [2022-02-14 15:46:30,837 INFO L226 Difference]: Without dead ends: 96 [2022-02-14 15:46:30,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=331, Invalid=1309, Unknown=0, NotChecked=0, Total=1640 [2022-02-14 15:46:30,839 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 96 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:30,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 78 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:46:30,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-14 15:46:30,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 51. [2022-02-14 15:46:30,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 40 states have internal predecessors, (46), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-14 15:46:30,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-02-14 15:46:30,856 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 41 [2022-02-14 15:46:30,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:30,856 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-02-14 15:46:30,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:46:30,856 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-02-14 15:46:30,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-14 15:46:30,858 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:30,858 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:30,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:31,071 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,SelfDestructingSolverStorable11 [2022-02-14 15:46:31,071 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:31,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:31,072 INFO L85 PathProgramCache]: Analyzing trace with hash 271055459, now seen corresponding path program 3 times [2022-02-14 15:46:31,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:31,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350986006] [2022-02-14 15:46:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:31,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:31,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:31,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-14 15:46:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:31,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:46:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:31,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 15:46:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 15:46:31,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:31,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350986006] [2022-02-14 15:46:31,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350986006] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:31,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013297533] [2022-02-14 15:46:31,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:46:31,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:31,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:31,199 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:31,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-14 15:46:31,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-14 15:46:31,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:31,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 15:46:31,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 15:46:31,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 15:46:31,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013297533] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:31,576 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:31,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 25 [2022-02-14 15:46:31,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711135920] [2022-02-14 15:46:31,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:31,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-14 15:46:31,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:31,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-14 15:46:31,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-02-14 15:46:31,578 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:46:31,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:31,905 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2022-02-14 15:46:31,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-14 15:46:31,905 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 41 [2022-02-14 15:46:31,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:31,906 INFO L225 Difference]: With dead ends: 103 [2022-02-14 15:46:31,906 INFO L226 Difference]: Without dead ends: 83 [2022-02-14 15:46:31,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2022-02-14 15:46:31,907 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 78 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:31,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 54 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 15:46:31,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-14 15:46:31,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2022-02-14 15:46:31,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 40 states have internal predecessors, (46), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-14 15:46:31,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-02-14 15:46:31,916 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 41 [2022-02-14 15:46:31,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:31,916 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-02-14 15:46:31,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:46:31,916 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-02-14 15:46:31,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-14 15:46:31,917 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:31,917 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:31,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:32,127 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,SelfDestructingSolverStorable12 [2022-02-14 15:46:32,127 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:32,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:32,128 INFO L85 PathProgramCache]: Analyzing trace with hash 29952996, now seen corresponding path program 3 times [2022-02-14 15:46:32,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:32,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880667826] [2022-02-14 15:46:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:32,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:32,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:32,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-14 15:46:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:32,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:46:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:32,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 15:46:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 15:46:32,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:32,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880667826] [2022-02-14 15:46:32,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880667826] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:32,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211219215] [2022-02-14 15:46:32,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:46:32,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:32,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:32,256 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:32,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-14 15:46:32,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-14 15:46:32,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:32,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 15:46:32,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 15:46:32,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 15:46:32,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211219215] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:32,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:32,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-02-14 15:46:32,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504696989] [2022-02-14 15:46:32,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:32,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-14 15:46:32,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:32,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-14 15:46:32,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-02-14 15:46:32,667 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:46:32,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:32,972 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2022-02-14 15:46:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-14 15:46:32,973 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 41 [2022-02-14 15:46:32,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:32,974 INFO L225 Difference]: With dead ends: 89 [2022-02-14 15:46:32,974 INFO L226 Difference]: Without dead ends: 69 [2022-02-14 15:46:32,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=287, Invalid=1045, Unknown=0, NotChecked=0, Total=1332 [2022-02-14 15:46:32,975 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:32,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 80 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 15:46:32,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-14 15:46:32,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 53. [2022-02-14 15:46:32,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.170731707317073) internal successors, (48), 42 states have internal predecessors, (48), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-14 15:46:32,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-02-14 15:46:32,984 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2022-02-14 15:46:32,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:32,984 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-02-14 15:46:32,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:46:32,984 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-02-14 15:46:32,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-14 15:46:32,985 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:32,985 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:33,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:33,208 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,SelfDestructingSolverStorable13 [2022-02-14 15:46:33,208 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:33,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1132622015, now seen corresponding path program 6 times [2022-02-14 15:46:33,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:33,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670516083] [2022-02-14 15:46:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:33,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:33,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:33,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 15:46:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:33,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:46:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:33,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:46:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 15:46:33,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:33,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670516083] [2022-02-14 15:46:33,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670516083] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:33,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72882829] [2022-02-14 15:46:33,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:46:33,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:33,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:33,282 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:33,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-14 15:46:33,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-14 15:46:33,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:33,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-14 15:46:33,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 15:46:33,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 15:46:33,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72882829] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:33,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:33,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-02-14 15:46:33,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086582566] [2022-02-14 15:46:33,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:33,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-14 15:46:33,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:33,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-14 15:46:33,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-14 15:46:33,494 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 15:46:33,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:33,674 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-02-14 15:46:33,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-14 15:46:33,674 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 42 [2022-02-14 15:46:33,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:33,675 INFO L225 Difference]: With dead ends: 66 [2022-02-14 15:46:33,675 INFO L226 Difference]: Without dead ends: 64 [2022-02-14 15:46:33,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-02-14 15:46:33,676 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:33,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 52 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 15:46:33,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-14 15:46:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2022-02-14 15:46:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 15:46:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-02-14 15:46:33,687 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 42 [2022-02-14 15:46:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:33,688 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-02-14 15:46:33,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 15:46:33,688 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-02-14 15:46:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-14 15:46:33,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:33,689 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:33,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:33,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-14 15:46:33,911 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:33,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:33,911 INFO L85 PathProgramCache]: Analyzing trace with hash 492107334, now seen corresponding path program 7 times [2022-02-14 15:46:33,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:33,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914075481] [2022-02-14 15:46:33,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:33,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:34,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:34,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 15:46:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:34,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:46:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:34,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:46:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:34,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 15:46:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 15:46:34,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:34,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914075481] [2022-02-14 15:46:34,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914075481] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:34,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275795614] [2022-02-14 15:46:34,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:46:34,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:34,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:34,040 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:34,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-14 15:46:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:34,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-14 15:46:34,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 15:46:34,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 15:46:34,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275795614] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:34,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:34,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 26 [2022-02-14 15:46:34,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244612342] [2022-02-14 15:46:34,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:34,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-14 15:46:34,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:34,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-14 15:46:34,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-02-14 15:46:34,437 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:46:34,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:34,877 INFO L93 Difference]: Finished difference Result 172 states and 214 transitions. [2022-02-14 15:46:34,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-14 15:46:34,878 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 49 [2022-02-14 15:46:34,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:34,878 INFO L225 Difference]: With dead ends: 172 [2022-02-14 15:46:34,879 INFO L226 Difference]: Without dead ends: 149 [2022-02-14 15:46:34,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=436, Invalid=1726, Unknown=0, NotChecked=0, Total=2162 [2022-02-14 15:46:34,880 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 135 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:34,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 74 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:46:34,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-14 15:46:34,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 61. [2022-02-14 15:46:34,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 48 states have internal predecessors, (55), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 15:46:34,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2022-02-14 15:46:34,892 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 49 [2022-02-14 15:46:34,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:34,892 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2022-02-14 15:46:34,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:46:34,893 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2022-02-14 15:46:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-14 15:46:34,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:34,893 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:34,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:35,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:35,094 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:35,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:35,094 INFO L85 PathProgramCache]: Analyzing trace with hash -422072987, now seen corresponding path program 4 times [2022-02-14 15:46:35,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:35,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706554841] [2022-02-14 15:46:35,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:35,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:35,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:35,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 15:46:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:35,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:46:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:35,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:46:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:35,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 15:46:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 15:46:35,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:35,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706554841] [2022-02-14 15:46:35,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706554841] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:35,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653338503] [2022-02-14 15:46:35,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:46:35,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:35,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:35,228 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:35,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-14 15:46:35,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:46:35,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:35,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-14 15:46:35,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 15:46:35,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 15:46:35,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653338503] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:35,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:35,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 27 [2022-02-14 15:46:35,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936937918] [2022-02-14 15:46:35,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:35,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-14 15:46:35,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:35,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-14 15:46:35,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-02-14 15:46:35,617 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:46:36,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:36,066 INFO L93 Difference]: Finished difference Result 157 states and 193 transitions. [2022-02-14 15:46:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-14 15:46:36,066 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 49 [2022-02-14 15:46:36,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:36,067 INFO L225 Difference]: With dead ends: 157 [2022-02-14 15:46:36,067 INFO L226 Difference]: Without dead ends: 134 [2022-02-14 15:46:36,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=457, Invalid=1895, Unknown=0, NotChecked=0, Total=2352 [2022-02-14 15:46:36,069 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 117 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:36,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 62 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:46:36,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-14 15:46:36,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 61. [2022-02-14 15:46:36,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 48 states have internal predecessors, (55), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 15:46:36,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2022-02-14 15:46:36,085 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 49 [2022-02-14 15:46:36,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:36,086 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2022-02-14 15:46:36,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:46:36,086 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2022-02-14 15:46:36,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-14 15:46:36,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:36,086 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:36,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:36,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-14 15:46:36,310 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:36,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:36,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1303108134, now seen corresponding path program 5 times [2022-02-14 15:46:36,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:36,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955904359] [2022-02-14 15:46:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:36,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:36,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:36,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 15:46:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:36,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:46:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:36,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:46:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:36,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 15:46:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:36,451 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 15:46:36,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:36,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955904359] [2022-02-14 15:46:36,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955904359] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:36,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302911057] [2022-02-14 15:46:36,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:46:36,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:36,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:36,453 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:36,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-14 15:46:36,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-14 15:46:36,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:36,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-14 15:46:36,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 15:46:36,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 15:46:36,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302911057] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:36,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:36,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 28 [2022-02-14 15:46:36,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884134365] [2022-02-14 15:46:36,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:36,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-14 15:46:36,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:36,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-14 15:46:36,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-02-14 15:46:36,838 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:46:37,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:37,264 INFO L93 Difference]: Finished difference Result 141 states and 171 transitions. [2022-02-14 15:46:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-14 15:46:37,265 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 49 [2022-02-14 15:46:37,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:37,266 INFO L225 Difference]: With dead ends: 141 [2022-02-14 15:46:37,266 INFO L226 Difference]: Without dead ends: 118 [2022-02-14 15:46:37,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=455, Invalid=1897, Unknown=0, NotChecked=0, Total=2352 [2022-02-14 15:46:37,267 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 97 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:37,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 79 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:46:37,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-02-14 15:46:37,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 61. [2022-02-14 15:46:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 48 states have internal predecessors, (55), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 15:46:37,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2022-02-14 15:46:37,280 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 49 [2022-02-14 15:46:37,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:37,281 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2022-02-14 15:46:37,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:46:37,281 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2022-02-14 15:46:37,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-14 15:46:37,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:37,281 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:37,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:37,495 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,SelfDestructingSolverStorable17 [2022-02-14 15:46:37,495 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:37,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:37,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1050851963, now seen corresponding path program 6 times [2022-02-14 15:46:37,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:37,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137095596] [2022-02-14 15:46:37,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:37,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:37,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:37,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 15:46:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:37,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:46:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:37,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:46:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:37,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 15:46:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 15:46:37,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:37,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137095596] [2022-02-14 15:46:37,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137095596] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:37,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018617559] [2022-02-14 15:46:37,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:46:37,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:37,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:37,624 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:37,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-14 15:46:37,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-14 15:46:37,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:37,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-14 15:46:37,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 15:46:37,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 15:46:38,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018617559] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:38,006 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:38,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 29 [2022-02-14 15:46:38,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699721367] [2022-02-14 15:46:38,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:38,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-14 15:46:38,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:38,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-14 15:46:38,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-02-14 15:46:38,007 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:46:38,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:38,381 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2022-02-14 15:46:38,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-14 15:46:38,382 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 49 [2022-02-14 15:46:38,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:38,383 INFO L225 Difference]: With dead ends: 124 [2022-02-14 15:46:38,383 INFO L226 Difference]: Without dead ends: 101 [2022-02-14 15:46:38,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=424, Invalid=1738, Unknown=0, NotChecked=0, Total=2162 [2022-02-14 15:46:38,384 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:38,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 65 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 15:46:38,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-14 15:46:38,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 61. [2022-02-14 15:46:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 48 states have internal predecessors, (55), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 15:46:38,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2022-02-14 15:46:38,398 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 49 [2022-02-14 15:46:38,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:38,398 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2022-02-14 15:46:38,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:46:38,398 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2022-02-14 15:46:38,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-14 15:46:38,399 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:38,399 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:38,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:38,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:38,622 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:38,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:38,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1009170938, now seen corresponding path program 4 times [2022-02-14 15:46:38,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:38,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922302697] [2022-02-14 15:46:38,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:38,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:38,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:38,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 15:46:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:38,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:46:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:38,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:46:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:38,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 15:46:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 15:46:38,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:38,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922302697] [2022-02-14 15:46:38,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922302697] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:38,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445478663] [2022-02-14 15:46:38,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:46:38,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:38,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:38,740 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:38,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-14 15:46:38,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:46:38,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:38,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-14 15:46:38,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 15:46:39,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 15:46:39,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445478663] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:39,143 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:39,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-02-14 15:46:39,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601694160] [2022-02-14 15:46:39,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:39,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-14 15:46:39,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:39,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-14 15:46:39,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2022-02-14 15:46:39,145 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:46:39,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:39,462 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2022-02-14 15:46:39,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-14 15:46:39,462 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 49 [2022-02-14 15:46:39,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:39,463 INFO L225 Difference]: With dead ends: 106 [2022-02-14 15:46:39,463 INFO L226 Difference]: Without dead ends: 83 [2022-02-14 15:46:39,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=376, Invalid=1430, Unknown=0, NotChecked=0, Total=1806 [2022-02-14 15:46:39,464 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:39,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 77 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:46:39,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-14 15:46:39,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2022-02-14 15:46:39,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.163265306122449) internal successors, (57), 50 states have internal predecessors, (57), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 15:46:39,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-02-14 15:46:39,477 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 49 [2022-02-14 15:46:39,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:39,478 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-02-14 15:46:39,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:46:39,478 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-02-14 15:46:39,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-14 15:46:39,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:39,478 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:39,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:39,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:39,681 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:39,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1565235900, now seen corresponding path program 8 times [2022-02-14 15:46:39,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:39,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074433890] [2022-02-14 15:46:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:39,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:39,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:39,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-14 15:46:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:39,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:46:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:39,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:46:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:39,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:46:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 15:46:39,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:39,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074433890] [2022-02-14 15:46:39,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074433890] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:39,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427143718] [2022-02-14 15:46:39,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:46:39,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:39,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:39,763 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:39,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-14 15:46:39,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:46:39,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:39,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 15:46:39,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 15:46:39,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 15:46:39,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427143718] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:39,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:39,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 14 [2022-02-14 15:46:39,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154483947] [2022-02-14 15:46:39,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:40,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 15:46:40,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:40,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 15:46:40,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-14 15:46:40,002 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-14 15:46:40,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:40,184 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-02-14 15:46:40,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 15:46:40,185 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 50 [2022-02-14 15:46:40,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:40,185 INFO L225 Difference]: With dead ends: 76 [2022-02-14 15:46:40,185 INFO L226 Difference]: Without dead ends: 74 [2022-02-14 15:46:40,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-02-14 15:46:40,186 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 53 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:40,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 69 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 15:46:40,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-14 15:46:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2022-02-14 15:46:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 15:46:40,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-02-14 15:46:40,201 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 50 [2022-02-14 15:46:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:40,201 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-02-14 15:46:40,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-14 15:46:40,202 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-02-14 15:46:40,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-14 15:46:40,212 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:40,212 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:40,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:40,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:40,415 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:40,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:40,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1636099811, now seen corresponding path program 9 times [2022-02-14 15:46:40,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:40,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375373098] [2022-02-14 15:46:40,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:40,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:40,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:40,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-14 15:46:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:40,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:46:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:40,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:46:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:40,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:46:40,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:40,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:46:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:40,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:40,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375373098] [2022-02-14 15:46:40,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375373098] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:40,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524878292] [2022-02-14 15:46:40,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:46:40,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:40,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:40,556 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:40,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-14 15:46:40,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-14 15:46:40,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:40,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-14 15:46:40,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:40,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:40,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524878292] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:40,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:40,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 29 [2022-02-14 15:46:40,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923115431] [2022-02-14 15:46:40,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:40,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-14 15:46:40,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:40,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-14 15:46:40,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-02-14 15:46:40,968 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:46:41,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:41,507 INFO L93 Difference]: Finished difference Result 223 states and 279 transitions. [2022-02-14 15:46:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-14 15:46:41,509 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 57 [2022-02-14 15:46:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:41,510 INFO L225 Difference]: With dead ends: 223 [2022-02-14 15:46:41,510 INFO L226 Difference]: Without dead ends: 197 [2022-02-14 15:46:41,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=562, Invalid=2300, Unknown=0, NotChecked=0, Total=2862 [2022-02-14 15:46:41,512 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 153 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:41,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 80 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:46:41,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-02-14 15:46:41,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 71. [2022-02-14 15:46:41,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 56 states have internal predecessors, (64), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 15:46:41,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2022-02-14 15:46:41,540 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 57 [2022-02-14 15:46:41,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:41,540 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2022-02-14 15:46:41,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:46:41,540 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2022-02-14 15:46:41,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-14 15:46:41,541 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:41,541 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:41,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:41,746 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,SelfDestructingSolverStorable21 [2022-02-14 15:46:41,746 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:41,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:41,746 INFO L85 PathProgramCache]: Analyzing trace with hash -853885212, now seen corresponding path program 7 times [2022-02-14 15:46:41,746 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:41,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761118781] [2022-02-14 15:46:41,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:41,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:41,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:41,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-14 15:46:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:41,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:46:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:41,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:46:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:41,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:46:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:41,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:46:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 37 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:41,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:41,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761118781] [2022-02-14 15:46:41,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761118781] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:41,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970626699] [2022-02-14 15:46:41,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:46:41,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:41,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:41,900 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:41,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-14 15:46:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:41,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-14 15:46:41,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:42,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:42,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970626699] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:42,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:42,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 30 [2022-02-14 15:46:42,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814538351] [2022-02-14 15:46:42,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:42,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-14 15:46:42,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:42,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-14 15:46:42,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2022-02-14 15:46:42,341 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:46:42,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:42,915 INFO L93 Difference]: Finished difference Result 205 states and 254 transitions. [2022-02-14 15:46:42,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-14 15:46:42,915 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 57 [2022-02-14 15:46:42,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:42,916 INFO L225 Difference]: With dead ends: 205 [2022-02-14 15:46:42,916 INFO L226 Difference]: Without dead ends: 179 [2022-02-14 15:46:42,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=604, Invalid=2588, Unknown=0, NotChecked=0, Total=3192 [2022-02-14 15:46:42,918 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 104 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:42,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 92 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:46:42,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-14 15:46:42,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 71. [2022-02-14 15:46:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 56 states have internal predecessors, (64), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 15:46:42,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2022-02-14 15:46:42,933 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 57 [2022-02-14 15:46:42,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:42,933 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2022-02-14 15:46:42,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:46:42,933 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2022-02-14 15:46:42,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-14 15:46:42,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:42,934 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:42,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-02-14 15:46:43,151 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,SelfDestructingSolverStorable22 [2022-02-14 15:46:43,152 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:43,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:43,152 INFO L85 PathProgramCache]: Analyzing trace with hash -734009597, now seen corresponding path program 8 times [2022-02-14 15:46:43,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:43,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153779234] [2022-02-14 15:46:43,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:43,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:43,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:43,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-14 15:46:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:43,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:46:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:43,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:46:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:43,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:46:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:43,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:46:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:43,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:43,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153779234] [2022-02-14 15:46:43,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153779234] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:43,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935894522] [2022-02-14 15:46:43,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:46:43,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:43,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:43,291 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:43,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-14 15:46:43,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:46:43,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:43,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-14 15:46:43,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:43,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:43,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935894522] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:43,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:43,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 31 [2022-02-14 15:46:43,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232437810] [2022-02-14 15:46:43,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:43,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-14 15:46:43,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:43,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-14 15:46:43,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2022-02-14 15:46:43,734 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:46:44,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:44,334 INFO L93 Difference]: Finished difference Result 186 states and 228 transitions. [2022-02-14 15:46:44,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-14 15:46:44,335 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 57 [2022-02-14 15:46:44,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:44,336 INFO L225 Difference]: With dead ends: 186 [2022-02-14 15:46:44,336 INFO L226 Difference]: Without dead ends: 160 [2022-02-14 15:46:44,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=620, Invalid=2686, Unknown=0, NotChecked=0, Total=3306 [2022-02-14 15:46:44,337 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 106 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:44,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 93 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:46:44,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-02-14 15:46:44,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 71. [2022-02-14 15:46:44,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 56 states have internal predecessors, (64), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 15:46:44,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2022-02-14 15:46:44,356 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 57 [2022-02-14 15:46:44,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:44,356 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2022-02-14 15:46:44,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:46:44,357 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2022-02-14 15:46:44,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-14 15:46:44,357 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:44,357 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:44,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-02-14 15:46:44,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:44,567 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:44,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:44,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1312832828, now seen corresponding path program 9 times [2022-02-14 15:46:44,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:44,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124159181] [2022-02-14 15:46:44,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:44,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:44,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:44,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-14 15:46:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:44,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:46:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:44,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:46:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:44,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:46:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:44,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:46:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:44,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:44,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124159181] [2022-02-14 15:46:44,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124159181] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:44,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682765640] [2022-02-14 15:46:44,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:46:44,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:44,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:44,720 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:44,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-14 15:46:44,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-14 15:46:44,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:44,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-14 15:46:44,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:45,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:45,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682765640] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:45,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:45,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 32 [2022-02-14 15:46:45,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115055719] [2022-02-14 15:46:45,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:45,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-14 15:46:45,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:45,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-14 15:46:45,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2022-02-14 15:46:45,163 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:46:45,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:45,716 INFO L93 Difference]: Finished difference Result 166 states and 201 transitions. [2022-02-14 15:46:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-14 15:46:45,716 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 57 [2022-02-14 15:46:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:45,717 INFO L225 Difference]: With dead ends: 166 [2022-02-14 15:46:45,717 INFO L226 Difference]: Without dead ends: 140 [2022-02-14 15:46:45,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=600, Invalid=2592, Unknown=0, NotChecked=0, Total=3192 [2022-02-14 15:46:45,718 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 85 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:45,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 104 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:46:45,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-14 15:46:45,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 71. [2022-02-14 15:46:45,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 56 states have internal predecessors, (64), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 15:46:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2022-02-14 15:46:45,735 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 57 [2022-02-14 15:46:45,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:45,735 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2022-02-14 15:46:45,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:46:45,735 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2022-02-14 15:46:45,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-14 15:46:45,735 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:45,736 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:45,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-02-14 15:46:45,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:45,936 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:45,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:45,937 INFO L85 PathProgramCache]: Analyzing trace with hash -2076483805, now seen corresponding path program 10 times [2022-02-14 15:46:45,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:45,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947073901] [2022-02-14 15:46:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:45,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:46,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:46,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-14 15:46:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:46,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:46:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:46,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:46:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:46,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:46:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:46,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:46:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 37 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:46,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:46,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947073901] [2022-02-14 15:46:46,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947073901] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:46,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396968999] [2022-02-14 15:46:46,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:46:46,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:46,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:46,088 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:46,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-14 15:46:46,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:46:46,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:46,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-14 15:46:46,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:46,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:46,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396968999] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:46,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:46,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 33 [2022-02-14 15:46:46,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915243534] [2022-02-14 15:46:46,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:46,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-14 15:46:46,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:46,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-14 15:46:46,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2022-02-14 15:46:46,545 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:46:46,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:46,970 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2022-02-14 15:46:46,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-14 15:46:46,976 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 57 [2022-02-14 15:46:46,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:46,977 INFO L225 Difference]: With dead ends: 145 [2022-02-14 15:46:46,977 INFO L226 Difference]: Without dead ends: 119 [2022-02-14 15:46:46,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=547, Invalid=2315, Unknown=0, NotChecked=0, Total=2862 [2022-02-14 15:46:46,978 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 73 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:46,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 76 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:46:46,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-14 15:46:47,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 71. [2022-02-14 15:46:47,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 56 states have internal predecessors, (64), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 15:46:47,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2022-02-14 15:46:47,001 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 57 [2022-02-14 15:46:47,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:47,001 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2022-02-14 15:46:47,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:46:47,002 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2022-02-14 15:46:47,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-14 15:46:47,003 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:47,003 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:47,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:47,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-14 15:46:47,219 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:47,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:47,220 INFO L85 PathProgramCache]: Analyzing trace with hash 20139684, now seen corresponding path program 5 times [2022-02-14 15:46:47,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:47,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901751292] [2022-02-14 15:46:47,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:47,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:47,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:47,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-14 15:46:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:47,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:46:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:47,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:46:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:47,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:46:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:47,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:46:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:47,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:47,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901751292] [2022-02-14 15:46:47,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901751292] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:47,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45539872] [2022-02-14 15:46:47,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:46:47,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:47,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:47,374 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:47,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-14 15:46:47,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-14 15:46:47,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:47,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-14 15:46:47,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:47,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:47,866 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:47,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45539872] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:47,867 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:47,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-02-14 15:46:47,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489424055] [2022-02-14 15:46:47,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:47,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-14 15:46:47,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:47,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-14 15:46:47,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2022-02-14 15:46:47,868 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:46:48,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:48,293 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2022-02-14 15:46:48,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-14 15:46:48,293 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 57 [2022-02-14 15:46:48,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:48,294 INFO L225 Difference]: With dead ends: 123 [2022-02-14 15:46:48,294 INFO L226 Difference]: Without dead ends: 97 [2022-02-14 15:46:48,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=477, Invalid=1875, Unknown=0, NotChecked=0, Total=2352 [2022-02-14 15:46:48,295 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:48,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 92 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:46:48,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-14 15:46:48,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 73. [2022-02-14 15:46:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 58 states have internal predecessors, (66), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 15:46:48,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2022-02-14 15:46:48,318 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 57 [2022-02-14 15:46:48,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:48,318 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2022-02-14 15:46:48,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:46:48,319 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2022-02-14 15:46:48,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-14 15:46:48,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:48,319 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:48,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:48,535 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,SelfDestructingSolverStorable26 [2022-02-14 15:46:48,536 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:48,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:48,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1686341663, now seen corresponding path program 10 times [2022-02-14 15:46:48,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:48,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660942644] [2022-02-14 15:46:48,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:48,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:48,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:48,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-14 15:46:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:48,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:46:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:48,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:46:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:48,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:46:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:48,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:46:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:48,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:48,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660942644] [2022-02-14 15:46:48,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660942644] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:48,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774269927] [2022-02-14 15:46:48,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:46:48,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:48,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:48,672 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:48,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-14 15:46:48,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:46:48,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:48,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-14 15:46:48,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 31 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:48,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 31 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 15:46:48,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774269927] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:48,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:48,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 15 [2022-02-14 15:46:48,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211308278] [2022-02-14 15:46:48,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:48,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-14 15:46:48,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:48,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-14 15:46:48,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-02-14 15:46:48,917 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 15:46:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:49,145 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2022-02-14 15:46:49,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-14 15:46:49,146 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 58 [2022-02-14 15:46:49,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:49,146 INFO L225 Difference]: With dead ends: 86 [2022-02-14 15:46:49,146 INFO L226 Difference]: Without dead ends: 84 [2022-02-14 15:46:49,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-02-14 15:46:49,147 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 57 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:49,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 61 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 15:46:49,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-14 15:46:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-02-14 15:46:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:46:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2022-02-14 15:46:49,164 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 58 [2022-02-14 15:46:49,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:49,164 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2022-02-14 15:46:49,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 15:46:49,164 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2022-02-14 15:46:49,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-14 15:46:49,164 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:49,164 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:49,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-02-14 15:46:49,364 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,SelfDestructingSolverStorable27 [2022-02-14 15:46:49,365 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:49,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:49,365 INFO L85 PathProgramCache]: Analyzing trace with hash 33364390, now seen corresponding path program 11 times [2022-02-14 15:46:49,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:49,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6275125] [2022-02-14 15:46:49,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:49,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:49,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:49,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-14 15:46:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:49,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:46:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:49,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:46:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:49,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:46:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:49,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:46:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:49,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:46:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 53 proven. 37 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:49,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:49,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6275125] [2022-02-14 15:46:49,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6275125] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:49,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677050389] [2022-02-14 15:46:49,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:46:49,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:49,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:49,557 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:49,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-14 15:46:49,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-14 15:46:49,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:49,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-14 15:46:49,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:49,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:50,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677050389] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:50,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:50,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 32 [2022-02-14 15:46:50,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890631913] [2022-02-14 15:46:50,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:50,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-14 15:46:50,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:50,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-14 15:46:50,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-02-14 15:46:50,103 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:46:50,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:50,773 INFO L93 Difference]: Finished difference Result 281 states and 353 transitions. [2022-02-14 15:46:50,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-14 15:46:50,774 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 65 [2022-02-14 15:46:50,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:50,775 INFO L225 Difference]: With dead ends: 281 [2022-02-14 15:46:50,775 INFO L226 Difference]: Without dead ends: 252 [2022-02-14 15:46:50,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=704, Invalid=2956, Unknown=0, NotChecked=0, Total=3660 [2022-02-14 15:46:50,776 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 170 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:50,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 82 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:46:50,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-02-14 15:46:50,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 81. [2022-02-14 15:46:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:46:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2022-02-14 15:46:50,802 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 65 [2022-02-14 15:46:50,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:50,802 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2022-02-14 15:46:50,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:46:50,802 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2022-02-14 15:46:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-14 15:46:50,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:50,803 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:50,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-14 15:46:51,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-14 15:46:51,010 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:51,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:51,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1165660539, now seen corresponding path program 11 times [2022-02-14 15:46:51,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:51,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119068783] [2022-02-14 15:46:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:51,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:51,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:51,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-14 15:46:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:51,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:46:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:51,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:46:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:51,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:46:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:51,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:46:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:51,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:46:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 53 proven. 32 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:51,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:51,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119068783] [2022-02-14 15:46:51,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119068783] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:51,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652231130] [2022-02-14 15:46:51,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:46:51,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:51,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:51,183 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:51,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-14 15:46:51,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-14 15:46:51,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:51,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-14 15:46:51,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:51,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:51,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652231130] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:51,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:51,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 33 [2022-02-14 15:46:51,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034120426] [2022-02-14 15:46:51,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:51,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-14 15:46:51,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:51,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-14 15:46:51,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2022-02-14 15:46:51,715 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:46:52,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:52,350 INFO L93 Difference]: Finished difference Result 260 states and 324 transitions. [2022-02-14 15:46:52,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-14 15:46:52,351 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 65 [2022-02-14 15:46:52,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:52,352 INFO L225 Difference]: With dead ends: 260 [2022-02-14 15:46:52,352 INFO L226 Difference]: Without dead ends: 231 [2022-02-14 15:46:52,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=772, Invalid=3388, Unknown=0, NotChecked=0, Total=4160 [2022-02-14 15:46:52,353 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 133 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:52,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 86 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:46:52,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-02-14 15:46:52,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 81. [2022-02-14 15:46:52,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:46:52,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2022-02-14 15:46:52,379 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 65 [2022-02-14 15:46:52,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:52,379 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2022-02-14 15:46:52,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:46:52,380 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2022-02-14 15:46:52,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-14 15:46:52,380 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:52,380 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:52,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:52,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:52,580 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:52,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:52,581 INFO L85 PathProgramCache]: Analyzing trace with hash 319272326, now seen corresponding path program 12 times [2022-02-14 15:46:52,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:52,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991521703] [2022-02-14 15:46:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:52,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:52,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:52,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-14 15:46:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:52,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:46:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:52,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:46:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:52,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:46:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:52,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:46:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:52,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:46:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 53 proven. 29 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:52,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:52,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991521703] [2022-02-14 15:46:52,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991521703] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:52,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336602179] [2022-02-14 15:46:52,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:46:52,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:52,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:52,760 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:52,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-14 15:46:52,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-14 15:46:52,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:52,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-14 15:46:52,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:53,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:53,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336602179] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:53,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:53,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 34 [2022-02-14 15:46:53,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382900305] [2022-02-14 15:46:53,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:53,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-14 15:46:53,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:53,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-14 15:46:53,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2022-02-14 15:46:53,322 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:46:54,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:54,060 INFO L93 Difference]: Finished difference Result 238 states and 294 transitions. [2022-02-14 15:46:54,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-14 15:46:54,061 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 65 [2022-02-14 15:46:54,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:54,062 INFO L225 Difference]: With dead ends: 238 [2022-02-14 15:46:54,062 INFO L226 Difference]: Without dead ends: 209 [2022-02-14 15:46:54,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=812, Invalid=3610, Unknown=0, NotChecked=0, Total=4422 [2022-02-14 15:46:54,063 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 123 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:54,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 82 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:46:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-02-14 15:46:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 81. [2022-02-14 15:46:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:46:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2022-02-14 15:46:54,091 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 65 [2022-02-14 15:46:54,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:54,091 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2022-02-14 15:46:54,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:46:54,091 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2022-02-14 15:46:54,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-14 15:46:54,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:54,092 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:54,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-02-14 15:46:54,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:54,314 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:54,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:54,314 INFO L85 PathProgramCache]: Analyzing trace with hash -892449115, now seen corresponding path program 13 times [2022-02-14 15:46:54,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:54,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116648678] [2022-02-14 15:46:54,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:54,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:54,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:54,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-14 15:46:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:54,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:46:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:54,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:46:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:54,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:46:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:54,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:46:54,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:54,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:46:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 53 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:54,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:54,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116648678] [2022-02-14 15:46:54,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116648678] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:54,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130997133] [2022-02-14 15:46:54,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:46:54,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:54,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:54,491 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:54,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-14 15:46:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:54,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-14 15:46:54,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 69 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:54,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 69 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:55,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130997133] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:55,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:55,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 35 [2022-02-14 15:46:55,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687779503] [2022-02-14 15:46:55,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:55,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-14 15:46:55,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:55,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-14 15:46:55,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2022-02-14 15:46:55,071 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:46:55,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:55,757 INFO L93 Difference]: Finished difference Result 215 states and 263 transitions. [2022-02-14 15:46:55,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-14 15:46:55,757 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 65 [2022-02-14 15:46:55,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:55,758 INFO L225 Difference]: With dead ends: 215 [2022-02-14 15:46:55,758 INFO L226 Difference]: Without dead ends: 186 [2022-02-14 15:46:55,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=810, Invalid=3612, Unknown=0, NotChecked=0, Total=4422 [2022-02-14 15:46:55,759 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 96 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:55,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 85 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:46:55,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-02-14 15:46:55,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 81. [2022-02-14 15:46:55,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:46:55,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2022-02-14 15:46:55,789 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 65 [2022-02-14 15:46:55,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:55,789 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2022-02-14 15:46:55,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:46:55,790 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2022-02-14 15:46:55,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-14 15:46:55,790 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:55,790 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:55,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-02-14 15:46:56,003 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,SelfDestructingSolverStorable31 [2022-02-14 15:46:56,003 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:56,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:56,004 INFO L85 PathProgramCache]: Analyzing trace with hash 198891878, now seen corresponding path program 14 times [2022-02-14 15:46:56,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:56,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294972530] [2022-02-14 15:46:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:56,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:56,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:56,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-14 15:46:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:56,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:46:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:56,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:46:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:56,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:46:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:56,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:46:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:56,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:46:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 53 proven. 29 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:56,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:56,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294972530] [2022-02-14 15:46:56,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294972530] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:56,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52171906] [2022-02-14 15:46:56,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:46:56,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:56,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:56,178 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:56,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-14 15:46:56,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:46:56,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:56,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-14 15:46:56,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:56,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:56,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52171906] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:56,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:56,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 36 [2022-02-14 15:46:56,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877664334] [2022-02-14 15:46:56,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:56,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-14 15:46:56,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:56,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-14 15:46:56,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2022-02-14 15:46:56,777 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:46:57,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:57,357 INFO L93 Difference]: Finished difference Result 191 states and 231 transitions. [2022-02-14 15:46:57,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-14 15:46:57,357 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 65 [2022-02-14 15:46:57,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:57,358 INFO L225 Difference]: With dead ends: 191 [2022-02-14 15:46:57,358 INFO L226 Difference]: Without dead ends: 162 [2022-02-14 15:46:57,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=766, Invalid=3394, Unknown=0, NotChecked=0, Total=4160 [2022-02-14 15:46:57,359 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 82 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:57,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 82 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:46:57,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-02-14 15:46:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 81. [2022-02-14 15:46:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:46:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2022-02-14 15:46:57,392 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 65 [2022-02-14 15:46:57,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:57,392 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2022-02-14 15:46:57,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:46:57,392 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2022-02-14 15:46:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-14 15:46:57,393 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:57,393 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:57,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-14 15:46:57,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:57,616 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:57,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:57,616 INFO L85 PathProgramCache]: Analyzing trace with hash -329275707, now seen corresponding path program 15 times [2022-02-14 15:46:57,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:57,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914272805] [2022-02-14 15:46:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:57,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:57,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:57,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-14 15:46:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:57,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:46:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:57,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:46:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:57,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:46:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:57,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:46:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:57,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:46:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 53 proven. 32 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:57,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:57,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914272805] [2022-02-14 15:46:57,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914272805] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:57,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240181741] [2022-02-14 15:46:57,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:46:57,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:57,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:57,797 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:57,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-14 15:46:57,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-14 15:46:57,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:57,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-14 15:46:57,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:58,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:58,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240181741] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:58,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:58,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 37 [2022-02-14 15:46:58,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071868939] [2022-02-14 15:46:58,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:58,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-14 15:46:58,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:58,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-14 15:46:58,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2022-02-14 15:46:58,334 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:46:58,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:46:58,881 INFO L93 Difference]: Finished difference Result 166 states and 198 transitions. [2022-02-14 15:46:58,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-14 15:46:58,881 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 65 [2022-02-14 15:46:58,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:46:58,882 INFO L225 Difference]: With dead ends: 166 [2022-02-14 15:46:58,882 INFO L226 Difference]: Without dead ends: 137 [2022-02-14 15:46:58,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=686, Invalid=2974, Unknown=0, NotChecked=0, Total=3660 [2022-02-14 15:46:58,883 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 80 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:46:58,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 87 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:46:58,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-14 15:46:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 81. [2022-02-14 15:46:58,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:46:58,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2022-02-14 15:46:58,917 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 65 [2022-02-14 15:46:58,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:46:58,917 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2022-02-14 15:46:58,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:46:58,917 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2022-02-14 15:46:58,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-14 15:46:58,918 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:46:58,918 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:46:58,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-02-14 15:46:59,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:59,131 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:46:59,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:46:59,132 INFO L85 PathProgramCache]: Analyzing trace with hash 477398342, now seen corresponding path program 6 times [2022-02-14 15:46:59,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:46:59,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186593619] [2022-02-14 15:46:59,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:46:59,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:46:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:59,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:46:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:59,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-14 15:46:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:59,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:46:59,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:59,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:46:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:59,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:46:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:59,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:46:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:59,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:46:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:46:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 53 proven. 37 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:59,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:46:59,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186593619] [2022-02-14 15:46:59,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186593619] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:46:59,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998585073] [2022-02-14 15:46:59,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:46:59,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:46:59,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:46:59,316 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:46:59,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-14 15:46:59,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-14 15:46:59,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:46:59,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-14 15:46:59,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:46:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:59,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:46:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:46:59,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998585073] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:46:59,931 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:46:59,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-02-14 15:46:59,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647554809] [2022-02-14 15:46:59,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:46:59,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-14 15:46:59,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:46:59,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-14 15:46:59,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2022-02-14 15:46:59,933 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:47:00,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:00,356 INFO L93 Difference]: Finished difference Result 140 states and 164 transitions. [2022-02-14 15:47:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-14 15:47:00,357 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 65 [2022-02-14 15:47:00,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:00,357 INFO L225 Difference]: With dead ends: 140 [2022-02-14 15:47:00,357 INFO L226 Difference]: Without dead ends: 111 [2022-02-14 15:47:00,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=590, Invalid=2380, Unknown=0, NotChecked=0, Total=2970 [2022-02-14 15:47:00,358 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:00,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 78 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:47:00,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-02-14 15:47:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 83. [2022-02-14 15:47:00,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 66 states have internal predecessors, (75), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:47:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2022-02-14 15:47:00,394 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 65 [2022-02-14 15:47:00,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:00,394 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2022-02-14 15:47:00,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:47:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2022-02-14 15:47:00,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-14 15:47:00,395 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:00,395 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:00,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-02-14 15:47:00,599 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,SelfDestructingSolverStorable34 [2022-02-14 15:47:00,599 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:00,600 INFO L85 PathProgramCache]: Analyzing trace with hash -280310620, now seen corresponding path program 12 times [2022-02-14 15:47:00,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:00,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55003151] [2022-02-14 15:47:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:00,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:00,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:00,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-14 15:47:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:00,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:47:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:00,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:47:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:00,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:47:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:00,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:47:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:00,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:47:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 64 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:47:00,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:00,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55003151] [2022-02-14 15:47:00,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55003151] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:00,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580602839] [2022-02-14 15:47:00,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:47:00,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:00,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:00,712 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:00,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-14 15:47:00,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-14 15:47:00,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:00,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-14 15:47:00,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:00,880 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:47:00,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 15:47:00,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580602839] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:00,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:00,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 16 [2022-02-14 15:47:00,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809414597] [2022-02-14 15:47:00,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:00,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 15:47:00,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:00,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 15:47:00,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-14 15:47:00,997 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 13 states have internal predecessors, (42), 8 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 15:47:01,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:01,241 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2022-02-14 15:47:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-14 15:47:01,242 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 13 states have internal predecessors, (42), 8 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 66 [2022-02-14 15:47:01,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:01,242 INFO L225 Difference]: With dead ends: 96 [2022-02-14 15:47:01,242 INFO L226 Difference]: Without dead ends: 94 [2022-02-14 15:47:01,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-02-14 15:47:01,243 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 65 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:01,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 68 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 15:47:01,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-14 15:47:01,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2022-02-14 15:47:01,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 15:47:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2022-02-14 15:47:01,271 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 66 [2022-02-14 15:47:01,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:01,271 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2022-02-14 15:47:01,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 13 states have internal predecessors, (42), 8 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 15:47:01,271 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2022-02-14 15:47:01,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-14 15:47:01,271 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:01,271 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:01,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-14 15:47:01,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-14 15:47:01,472 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:01,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:01,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1840083843, now seen corresponding path program 13 times [2022-02-14 15:47:01,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:01,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051340595] [2022-02-14 15:47:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:01,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:01,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:01,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-14 15:47:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:01,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:47:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:01,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:47:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:01,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:47:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:01,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:47:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:01,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:47:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:01,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:47:01,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 72 proven. 47 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:01,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:01,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051340595] [2022-02-14 15:47:01,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051340595] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:01,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109992032] [2022-02-14 15:47:01,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:47:01,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:01,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:01,672 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:01,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-14 15:47:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:01,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-14 15:47:01,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:02,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:02,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109992032] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:02,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:02,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 35 [2022-02-14 15:47:02,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924383907] [2022-02-14 15:47:02,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:02,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-14 15:47:02,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:02,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-14 15:47:02,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2022-02-14 15:47:02,312 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:47:03,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:03,203 INFO L93 Difference]: Finished difference Result 346 states and 436 transitions. [2022-02-14 15:47:03,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-14 15:47:03,203 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 73 [2022-02-14 15:47:03,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:03,204 INFO L225 Difference]: With dead ends: 346 [2022-02-14 15:47:03,204 INFO L226 Difference]: Without dead ends: 314 [2022-02-14 15:47:03,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=862, Invalid=3694, Unknown=0, NotChecked=0, Total=4556 [2022-02-14 15:47:03,205 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 169 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:03,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 102 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:47:03,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-14 15:47:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 91. [2022-02-14 15:47:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 72 states have internal predecessors, (82), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 15:47:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2022-02-14 15:47:03,256 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 73 [2022-02-14 15:47:03,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:03,257 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2022-02-14 15:47:03,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:47:03,257 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2022-02-14 15:47:03,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-14 15:47:03,257 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:03,258 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:03,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-14 15:47:03,479 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,SelfDestructingSolverStorable36 [2022-02-14 15:47:03,479 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:03,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:03,480 INFO L85 PathProgramCache]: Analyzing trace with hash -335235644, now seen corresponding path program 16 times [2022-02-14 15:47:03,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:03,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474518548] [2022-02-14 15:47:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:03,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:03,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:03,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-14 15:47:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:03,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:47:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:03,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:47:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:03,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:47:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:03,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:47:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:03,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:47:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:03,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:47:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 72 proven. 41 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:03,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:03,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474518548] [2022-02-14 15:47:03,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474518548] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:03,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173845615] [2022-02-14 15:47:03,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:47:03,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:03,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:03,684 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:03,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-14 15:47:03,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:47:03,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:03,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-14 15:47:03,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:04,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:04,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173845615] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:04,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:04,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 36 [2022-02-14 15:47:04,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764456041] [2022-02-14 15:47:04,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:04,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-14 15:47:04,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:04,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-14 15:47:04,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2022-02-14 15:47:04,215 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:47:05,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:05,138 INFO L93 Difference]: Finished difference Result 322 states and 403 transitions. [2022-02-14 15:47:05,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-14 15:47:05,139 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 73 [2022-02-14 15:47:05,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:05,139 INFO L225 Difference]: With dead ends: 322 [2022-02-14 15:47:05,140 INFO L226 Difference]: Without dead ends: 290 [2022-02-14 15:47:05,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=961, Invalid=4295, Unknown=0, NotChecked=0, Total=5256 [2022-02-14 15:47:05,140 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 160 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:05,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 109 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:47:05,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-14 15:47:05,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 91. [2022-02-14 15:47:05,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 72 states have internal predecessors, (82), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 15:47:05,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2022-02-14 15:47:05,177 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 73 [2022-02-14 15:47:05,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:05,177 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2022-02-14 15:47:05,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:47:05,177 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2022-02-14 15:47:05,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-14 15:47:05,178 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:05,178 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:05,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-14 15:47:05,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:05,379 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:05,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:05,379 INFO L85 PathProgramCache]: Analyzing trace with hash 949336995, now seen corresponding path program 17 times [2022-02-14 15:47:05,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:05,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193041983] [2022-02-14 15:47:05,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:05,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:05,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:05,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-14 15:47:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:05,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:47:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:05,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:47:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:05,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:47:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:05,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:47:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:05,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:47:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:05,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:47:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 72 proven. 37 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:05,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:05,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193041983] [2022-02-14 15:47:05,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193041983] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:05,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674373364] [2022-02-14 15:47:05,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:47:05,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:05,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:05,584 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:05,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-14 15:47:05,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-02-14 15:47:05,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:05,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-14 15:47:05,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:06,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:06,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674373364] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:06,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:06,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 37 [2022-02-14 15:47:06,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49598656] [2022-02-14 15:47:06,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:06,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-14 15:47:06,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:06,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-14 15:47:06,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1098, Unknown=0, NotChecked=0, Total=1332 [2022-02-14 15:47:06,190 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:47:07,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:07,156 INFO L93 Difference]: Finished difference Result 297 states and 369 transitions. [2022-02-14 15:47:07,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-14 15:47:07,156 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 73 [2022-02-14 15:47:07,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:07,158 INFO L225 Difference]: With dead ends: 297 [2022-02-14 15:47:07,158 INFO L226 Difference]: Without dead ends: 265 [2022-02-14 15:47:07,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1031, Invalid=4669, Unknown=0, NotChecked=0, Total=5700 [2022-02-14 15:47:07,163 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 153 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:07,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 111 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:47:07,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-14 15:47:07,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 91. [2022-02-14 15:47:07,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 72 states have internal predecessors, (82), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 15:47:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2022-02-14 15:47:07,207 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 73 [2022-02-14 15:47:07,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:07,207 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2022-02-14 15:47:07,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:47:07,207 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2022-02-14 15:47:07,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-14 15:47:07,208 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:07,208 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:07,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-02-14 15:47:07,408 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,SelfDestructingSolverStorable38 [2022-02-14 15:47:07,408 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:07,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:07,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2116383140, now seen corresponding path program 18 times [2022-02-14 15:47:07,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:07,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076880697] [2022-02-14 15:47:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:07,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:07,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:07,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-14 15:47:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:07,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:47:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:07,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:47:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:07,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:47:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:07,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:47:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:07,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:47:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:07,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:47:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 72 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:07,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:07,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076880697] [2022-02-14 15:47:07,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076880697] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:07,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575084367] [2022-02-14 15:47:07,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:47:07,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:07,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:07,608 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:07,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-14 15:47:07,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-02-14 15:47:07,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:07,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-14 15:47:07,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:08,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:08,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575084367] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:08,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:08,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 38 [2022-02-14 15:47:08,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6534141] [2022-02-14 15:47:08,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:08,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-14 15:47:08,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:08,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-14 15:47:08,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1163, Unknown=0, NotChecked=0, Total=1406 [2022-02-14 15:47:08,196 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 38 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 37 states have internal predecessors, (68), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:47:09,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:09,136 INFO L93 Difference]: Finished difference Result 271 states and 334 transitions. [2022-02-14 15:47:09,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-14 15:47:09,136 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 37 states have internal predecessors, (68), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 73 [2022-02-14 15:47:09,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:09,138 INFO L225 Difference]: With dead ends: 271 [2022-02-14 15:47:09,138 INFO L226 Difference]: Without dead ends: 239 [2022-02-14 15:47:09,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1054, Invalid=4798, Unknown=0, NotChecked=0, Total=5852 [2022-02-14 15:47:09,139 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 127 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:09,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 94 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:47:09,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-14 15:47:09,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 91. [2022-02-14 15:47:09,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 72 states have internal predecessors, (82), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 15:47:09,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2022-02-14 15:47:09,186 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 73 [2022-02-14 15:47:09,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:09,187 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2022-02-14 15:47:09,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 37 states have internal predecessors, (68), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:47:09,187 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2022-02-14 15:47:09,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-14 15:47:09,187 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:09,187 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:09,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-14 15:47:09,411 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,SelfDestructingSolverStorable39 [2022-02-14 15:47:09,411 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:09,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:09,411 INFO L85 PathProgramCache]: Analyzing trace with hash -359892029, now seen corresponding path program 19 times [2022-02-14 15:47:09,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:09,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709541446] [2022-02-14 15:47:09,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:09,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:09,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:09,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-14 15:47:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:09,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:47:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:09,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:47:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:09,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:47:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:09,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:47:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:09,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:47:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:09,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:47:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 72 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:09,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:09,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709541446] [2022-02-14 15:47:09,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709541446] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:09,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038082671] [2022-02-14 15:47:09,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:47:09,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:09,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:09,610 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:09,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-14 15:47:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:09,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-14 15:47:09,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:10,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:10,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038082671] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:10,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:10,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 39 [2022-02-14 15:47:10,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23554456] [2022-02-14 15:47:10,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:10,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-14 15:47:10,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:10,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-14 15:47:10,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1226, Unknown=0, NotChecked=0, Total=1482 [2022-02-14 15:47:10,250 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:47:11,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:11,147 INFO L93 Difference]: Finished difference Result 244 states and 298 transitions. [2022-02-14 15:47:11,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-14 15:47:11,147 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 73 [2022-02-14 15:47:11,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:11,148 INFO L225 Difference]: With dead ends: 244 [2022-02-14 15:47:11,148 INFO L226 Difference]: Without dead ends: 212 [2022-02-14 15:47:11,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1792 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1027, Invalid=4673, Unknown=0, NotChecked=0, Total=5700 [2022-02-14 15:47:11,149 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 94 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:11,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 105 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:47:11,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-14 15:47:11,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 91. [2022-02-14 15:47:11,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 72 states have internal predecessors, (82), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 15:47:11,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2022-02-14 15:47:11,190 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 73 [2022-02-14 15:47:11,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:11,190 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2022-02-14 15:47:11,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:47:11,190 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2022-02-14 15:47:11,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-14 15:47:11,191 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:11,191 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:11,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-02-14 15:47:11,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:11,391 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:11,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:11,395 INFO L85 PathProgramCache]: Analyzing trace with hash 184989060, now seen corresponding path program 20 times [2022-02-14 15:47:11,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:11,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948681180] [2022-02-14 15:47:11,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:11,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:11,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:11,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-14 15:47:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:11,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:47:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:11,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:47:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:11,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:47:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:11,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:47:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:11,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:47:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:11,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:47:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 72 proven. 37 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:11,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:11,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948681180] [2022-02-14 15:47:11,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948681180] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:11,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242835167] [2022-02-14 15:47:11,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:47:11,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:11,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:11,589 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:11,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-14 15:47:11,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:47:11,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:11,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-14 15:47:11,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:12,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:12,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242835167] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:12,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:12,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 40 [2022-02-14 15:47:12,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440938496] [2022-02-14 15:47:12,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:12,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-14 15:47:12,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:12,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-14 15:47:12,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1287, Unknown=0, NotChecked=0, Total=1560 [2022-02-14 15:47:12,188 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:47:12,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:12,939 INFO L93 Difference]: Finished difference Result 216 states and 261 transitions. [2022-02-14 15:47:12,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-14 15:47:12,939 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 73 [2022-02-14 15:47:12,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:12,940 INFO L225 Difference]: With dead ends: 216 [2022-02-14 15:47:12,940 INFO L226 Difference]: Without dead ends: 184 [2022-02-14 15:47:12,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=953, Invalid=4303, Unknown=0, NotChecked=0, Total=5256 [2022-02-14 15:47:12,942 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 81 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:12,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 103 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:47:12,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-14 15:47:12,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 91. [2022-02-14 15:47:12,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 72 states have internal predecessors, (82), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 15:47:12,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2022-02-14 15:47:12,996 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 73 [2022-02-14 15:47:12,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:12,997 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2022-02-14 15:47:12,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:47:12,997 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2022-02-14 15:47:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-14 15:47:12,997 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:12,997 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:13,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-14 15:47:13,219 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,SelfDestructingSolverStorable41 [2022-02-14 15:47:13,219 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:13,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:13,220 INFO L85 PathProgramCache]: Analyzing trace with hash -103566365, now seen corresponding path program 21 times [2022-02-14 15:47:13,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:13,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848147714] [2022-02-14 15:47:13,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:13,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:13,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:13,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-14 15:47:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:13,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:47:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:13,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:47:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:13,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:47:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:13,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:47:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:13,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:47:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:13,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:47:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 72 proven. 41 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:13,409 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:13,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848147714] [2022-02-14 15:47:13,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848147714] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:13,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231626500] [2022-02-14 15:47:13,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:47:13,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:13,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:13,412 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:13,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-14 15:47:13,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-14 15:47:13,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:13,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-14 15:47:13,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:13,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:14,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231626500] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:14,067 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:14,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 41 [2022-02-14 15:47:14,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083277668] [2022-02-14 15:47:14,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:14,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-14 15:47:14,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:14,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-14 15:47:14,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2022-02-14 15:47:14,068 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:47:14,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:14,675 INFO L93 Difference]: Finished difference Result 187 states and 223 transitions. [2022-02-14 15:47:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-14 15:47:14,676 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 73 [2022-02-14 15:47:14,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:14,676 INFO L225 Difference]: With dead ends: 187 [2022-02-14 15:47:14,677 INFO L226 Difference]: Without dead ends: 155 [2022-02-14 15:47:14,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=841, Invalid=3715, Unknown=0, NotChecked=0, Total=4556 [2022-02-14 15:47:14,679 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:14,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 89 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:47:14,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-02-14 15:47:14,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 91. [2022-02-14 15:47:14,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 72 states have internal predecessors, (82), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 15:47:14,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2022-02-14 15:47:14,731 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 73 [2022-02-14 15:47:14,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:14,731 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2022-02-14 15:47:14,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:47:14,732 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2022-02-14 15:47:14,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-14 15:47:14,732 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:14,732 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:14,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-14 15:47:14,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:14,939 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:14,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:14,940 INFO L85 PathProgramCache]: Analyzing trace with hash -458849948, now seen corresponding path program 7 times [2022-02-14 15:47:14,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:14,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387432715] [2022-02-14 15:47:14,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:14,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:15,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:15,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-14 15:47:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:15,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:47:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:15,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:47:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:15,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:47:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:15,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:47:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:15,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:47:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:15,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:47:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 72 proven. 47 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:15,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:15,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387432715] [2022-02-14 15:47:15,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387432715] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:15,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375205425] [2022-02-14 15:47:15,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:47:15,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:15,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:15,133 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:15,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-14 15:47:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:15,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-14 15:47:15,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:15,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:15,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375205425] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:15,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:15,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-02-14 15:47:15,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58459398] [2022-02-14 15:47:15,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:15,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-14 15:47:15,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:15,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-14 15:47:15,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1403, Unknown=0, NotChecked=0, Total=1722 [2022-02-14 15:47:15,746 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 41 states have internal predecessors, (72), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:47:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:16,277 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2022-02-14 15:47:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-14 15:47:16,279 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 41 states have internal predecessors, (72), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 73 [2022-02-14 15:47:16,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:16,279 INFO L225 Difference]: With dead ends: 157 [2022-02-14 15:47:16,279 INFO L226 Difference]: Without dead ends: 125 [2022-02-14 15:47:16,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=715, Invalid=2945, Unknown=0, NotChecked=0, Total=3660 [2022-02-14 15:47:16,280 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 60 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:16,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 90 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:47:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-02-14 15:47:16,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2022-02-14 15:47:16,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 74 states have internal predecessors, (84), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 15:47:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2022-02-14 15:47:16,329 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 73 [2022-02-14 15:47:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:16,329 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2022-02-14 15:47:16,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 41 states have internal predecessors, (72), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:47:16,330 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2022-02-14 15:47:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-14 15:47:16,330 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:16,330 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:16,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-14 15:47:16,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:16,541 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:16,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:16,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1863272577, now seen corresponding path program 14 times [2022-02-14 15:47:16,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:16,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636360442] [2022-02-14 15:47:16,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:16,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:16,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:16,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-14 15:47:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:16,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:47:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:16,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:47:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:16,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:47:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:16,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:47:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:16,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:47:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:16,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:47:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 42 proven. 85 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:16,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:16,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636360442] [2022-02-14 15:47:16,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636360442] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:16,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529532455] [2022-02-14 15:47:16,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:47:16,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:16,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:16,680 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:16,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-14 15:47:16,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:47:16,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:16,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-14 15:47:16,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 50 proven. 77 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:16,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 50 proven. 77 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 15:47:17,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529532455] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:17,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:17,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 17 [2022-02-14 15:47:17,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283512013] [2022-02-14 15:47:17,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:17,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-14 15:47:17,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:17,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-14 15:47:17,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-02-14 15:47:17,030 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 9 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:47:17,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:17,398 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2022-02-14 15:47:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-14 15:47:17,399 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 9 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 74 [2022-02-14 15:47:17,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:17,399 INFO L225 Difference]: With dead ends: 106 [2022-02-14 15:47:17,399 INFO L226 Difference]: Without dead ends: 104 [2022-02-14 15:47:17,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-02-14 15:47:17,400 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 70 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:17,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 75 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:47:17,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-14 15:47:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2022-02-14 15:47:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:47:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2022-02-14 15:47:17,461 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 74 [2022-02-14 15:47:17,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:17,462 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2022-02-14 15:47:17,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 9 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:47:17,462 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2022-02-14 15:47:17,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-14 15:47:17,462 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:17,463 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:17,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-14 15:47:17,675 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,SelfDestructingSolverStorable44 [2022-02-14 15:47:17,675 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:17,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:17,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1197233414, now seen corresponding path program 15 times [2022-02-14 15:47:17,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:17,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660056659] [2022-02-14 15:47:17,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:17,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:17,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:17,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-14 15:47:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:17,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:47:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:17,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:47:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:17,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:47:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:17,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:47:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:17,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:47:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:17,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:47:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:17,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:47:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 94 proven. 58 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:17,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:17,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660056659] [2022-02-14 15:47:17,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660056659] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:17,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854893579] [2022-02-14 15:47:17,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:47:17,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:17,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:17,880 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:17,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-14 15:47:17,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-02-14 15:47:17,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:17,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-14 15:47:17,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:18,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:18,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854893579] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:18,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:18,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 38 [2022-02-14 15:47:18,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839039728] [2022-02-14 15:47:18,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:18,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-14 15:47:18,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:18,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-14 15:47:18,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2022-02-14 15:47:18,479 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:47:19,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:19,566 INFO L93 Difference]: Finished difference Result 418 states and 528 transitions. [2022-02-14 15:47:19,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-14 15:47:19,566 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 81 [2022-02-14 15:47:19,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:19,567 INFO L225 Difference]: With dead ends: 418 [2022-02-14 15:47:19,567 INFO L226 Difference]: Without dead ends: 383 [2022-02-14 15:47:19,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1036, Invalid=4514, Unknown=0, NotChecked=0, Total=5550 [2022-02-14 15:47:19,572 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 190 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:19,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 119 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:47:19,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-02-14 15:47:19,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 101. [2022-02-14 15:47:19,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 80 states have internal predecessors, (91), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:47:19,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2022-02-14 15:47:19,620 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 81 [2022-02-14 15:47:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:19,621 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2022-02-14 15:47:19,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:47:19,621 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2022-02-14 15:47:19,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-14 15:47:19,621 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:19,622 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:19,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-14 15:47:19,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-14 15:47:19,844 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:19,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1226623067, now seen corresponding path program 22 times [2022-02-14 15:47:19,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:19,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135299732] [2022-02-14 15:47:19,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:19,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:20,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:20,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-14 15:47:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:20,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:47:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:20,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:47:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:20,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:47:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:20,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:47:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:20,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:47:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:20,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:47:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:20,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:47:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 94 proven. 51 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:20,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:20,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135299732] [2022-02-14 15:47:20,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135299732] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:20,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117928554] [2022-02-14 15:47:20,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:47:20,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:20,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:20,048 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:20,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-14 15:47:20,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:47:20,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:20,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-14 15:47:20,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:20,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:20,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117928554] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:20,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:20,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 39 [2022-02-14 15:47:20,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762368309] [2022-02-14 15:47:20,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:20,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-14 15:47:20,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-14 15:47:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2022-02-14 15:47:20,667 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 38 states have internal predecessors, (71), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:47:21,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:21,850 INFO L93 Difference]: Finished difference Result 391 states and 491 transitions. [2022-02-14 15:47:21,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-14 15:47:21,850 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 38 states have internal predecessors, (71), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 81 [2022-02-14 15:47:21,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:21,852 INFO L225 Difference]: With dead ends: 391 [2022-02-14 15:47:21,852 INFO L226 Difference]: Without dead ends: 356 [2022-02-14 15:47:21,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1171, Invalid=5309, Unknown=0, NotChecked=0, Total=6480 [2022-02-14 15:47:21,852 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 185 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:21,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 88 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:47:21,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-02-14 15:47:21,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 101. [2022-02-14 15:47:21,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 80 states have internal predecessors, (91), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:47:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2022-02-14 15:47:21,907 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 81 [2022-02-14 15:47:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:21,907 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2022-02-14 15:47:21,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 38 states have internal predecessors, (71), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:47:21,908 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2022-02-14 15:47:21,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-14 15:47:21,908 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:21,908 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:21,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-02-14 15:47:22,113 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,SelfDestructingSolverStorable46 [2022-02-14 15:47:22,113 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:22,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:22,113 INFO L85 PathProgramCache]: Analyzing trace with hash 943237350, now seen corresponding path program 23 times [2022-02-14 15:47:22,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:22,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614351354] [2022-02-14 15:47:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:22,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:22,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:22,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-14 15:47:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:22,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:47:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:22,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:47:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:22,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:47:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:22,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:47:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:22,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:47:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:22,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:47:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:22,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:47:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:22,314 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 94 proven. 46 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:22,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:22,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614351354] [2022-02-14 15:47:22,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614351354] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:22,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056281764] [2022-02-14 15:47:22,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:47:22,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:22,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:22,320 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:22,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-14 15:47:22,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-02-14 15:47:22,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:22,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-14 15:47:22,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:22,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:22,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056281764] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:22,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:22,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 40 [2022-02-14 15:47:22,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20629838] [2022-02-14 15:47:22,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:22,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-14 15:47:22,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:22,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-14 15:47:22,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1285, Unknown=0, NotChecked=0, Total=1560 [2022-02-14 15:47:22,951 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 40 states, 40 states have (on average 1.8) internal successors, (72), 39 states have internal predecessors, (72), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:47:24,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:24,031 INFO L93 Difference]: Finished difference Result 363 states and 453 transitions. [2022-02-14 15:47:24,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-14 15:47:24,032 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.8) internal successors, (72), 39 states have internal predecessors, (72), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 81 [2022-02-14 15:47:24,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:24,033 INFO L225 Difference]: With dead ends: 363 [2022-02-14 15:47:24,033 INFO L226 Difference]: Without dead ends: 328 [2022-02-14 15:47:24,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1277, Invalid=5863, Unknown=0, NotChecked=0, Total=7140 [2022-02-14 15:47:24,034 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 158 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:24,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 85 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:47:24,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-02-14 15:47:24,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 101. [2022-02-14 15:47:24,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 80 states have internal predecessors, (91), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:47:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2022-02-14 15:47:24,103 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 81 [2022-02-14 15:47:24,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:24,103 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2022-02-14 15:47:24,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.8) internal successors, (72), 39 states have internal predecessors, (72), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:47:24,103 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2022-02-14 15:47:24,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-14 15:47:24,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:24,104 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:24,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-14 15:47:24,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:24,327 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:24,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:24,327 INFO L85 PathProgramCache]: Analyzing trace with hash -510566459, now seen corresponding path program 24 times [2022-02-14 15:47:24,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:24,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160892487] [2022-02-14 15:47:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:24,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:24,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:24,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-14 15:47:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:24,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:47:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:24,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:47:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:24,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:47:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:24,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:47:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:24,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:47:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:24,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:47:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:24,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:47:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 94 proven. 43 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:24,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:24,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160892487] [2022-02-14 15:47:24,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160892487] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:24,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397764248] [2022-02-14 15:47:24,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:47:24,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:24,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:24,518 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:24,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-14 15:47:24,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-02-14 15:47:24,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:24,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-14 15:47:24,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:24,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:25,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397764248] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:25,143 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:25,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 41 [2022-02-14 15:47:25,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828738814] [2022-02-14 15:47:25,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:25,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-14 15:47:25,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-14 15:47:25,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1357, Unknown=0, NotChecked=0, Total=1640 [2022-02-14 15:47:25,144 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 40 states have internal predecessors, (73), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:47:26,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:26,308 INFO L93 Difference]: Finished difference Result 334 states and 414 transitions. [2022-02-14 15:47:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-14 15:47:26,308 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 40 states have internal predecessors, (73), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 81 [2022-02-14 15:47:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:26,309 INFO L225 Difference]: With dead ends: 334 [2022-02-14 15:47:26,309 INFO L226 Difference]: Without dead ends: 299 [2022-02-14 15:47:26,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2439 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1332, Invalid=6150, Unknown=0, NotChecked=0, Total=7482 [2022-02-14 15:47:26,310 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 121 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:26,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 118 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:47:26,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-02-14 15:47:26,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 101. [2022-02-14 15:47:26,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 80 states have internal predecessors, (91), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:47:26,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2022-02-14 15:47:26,369 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 81 [2022-02-14 15:47:26,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:26,369 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2022-02-14 15:47:26,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 40 states have internal predecessors, (73), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:47:26,369 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2022-02-14 15:47:26,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-14 15:47:26,370 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:26,370 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:26,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-02-14 15:47:26,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-02-14 15:47:26,570 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:26,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:26,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1666155718, now seen corresponding path program 25 times [2022-02-14 15:47:26,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:26,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948613544] [2022-02-14 15:47:26,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:26,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:26,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:26,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-14 15:47:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:26,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:47:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:26,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:47:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:26,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:47:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:26,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:47:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:26,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:47:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:26,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:47:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:26,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:47:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 94 proven. 42 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:26,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:26,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948613544] [2022-02-14 15:47:26,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948613544] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:26,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33374122] [2022-02-14 15:47:26,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:47:26,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:26,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:26,792 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:26,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-14 15:47:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:26,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-14 15:47:26,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 116 proven. 20 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:27,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 116 proven. 20 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:27,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33374122] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:27,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:27,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 42 [2022-02-14 15:47:27,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395268266] [2022-02-14 15:47:27,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:27,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-14 15:47:27,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:27,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-14 15:47:27,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1427, Unknown=0, NotChecked=0, Total=1722 [2022-02-14 15:47:27,424 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:47:28,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:28,477 INFO L93 Difference]: Finished difference Result 304 states and 374 transitions. [2022-02-14 15:47:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-14 15:47:28,477 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 81 [2022-02-14 15:47:28,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:28,478 INFO L225 Difference]: With dead ends: 304 [2022-02-14 15:47:28,478 INFO L226 Difference]: Without dead ends: 269 [2022-02-14 15:47:28,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2430 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1330, Invalid=6152, Unknown=0, NotChecked=0, Total=7482 [2022-02-14 15:47:28,479 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 113 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:28,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 104 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:47:28,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-14 15:47:28,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 101. [2022-02-14 15:47:28,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 80 states have internal predecessors, (91), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:47:28,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2022-02-14 15:47:28,551 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 81 [2022-02-14 15:47:28,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:28,552 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2022-02-14 15:47:28,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:47:28,552 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2022-02-14 15:47:28,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-14 15:47:28,552 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:28,552 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:28,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-14 15:47:28,767 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,SelfDestructingSolverStorable49 [2022-02-14 15:47:28,767 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:28,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:28,768 INFO L85 PathProgramCache]: Analyzing trace with hash 425066469, now seen corresponding path program 26 times [2022-02-14 15:47:28,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:28,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981521955] [2022-02-14 15:47:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:28,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:28,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:28,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-14 15:47:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:28,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:47:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:28,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:47:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:28,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:47:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:28,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:47:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:28,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:47:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:28,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:47:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:28,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:47:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 94 proven. 43 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:28,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:28,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981521955] [2022-02-14 15:47:28,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981521955] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:28,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918796150] [2022-02-14 15:47:28,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:47:28,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:28,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:28,992 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:28,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-14 15:47:29,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:47:29,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:29,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-14 15:47:29,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:29,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:29,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918796150] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:29,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:29,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 43 [2022-02-14 15:47:29,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820320669] [2022-02-14 15:47:29,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:29,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-14 15:47:29,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:29,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-14 15:47:29,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2022-02-14 15:47:29,665 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:47:30,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:30,633 INFO L93 Difference]: Finished difference Result 273 states and 333 transitions. [2022-02-14 15:47:30,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-14 15:47:30,634 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 81 [2022-02-14 15:47:30,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:30,635 INFO L225 Difference]: With dead ends: 273 [2022-02-14 15:47:30,635 INFO L226 Difference]: Without dead ends: 238 [2022-02-14 15:47:30,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1271, Invalid=5869, Unknown=0, NotChecked=0, Total=7140 [2022-02-14 15:47:30,636 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 127 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:30,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 81 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:47:30,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-02-14 15:47:30,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 101. [2022-02-14 15:47:30,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 80 states have internal predecessors, (91), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:47:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2022-02-14 15:47:30,702 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 81 [2022-02-14 15:47:30,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:30,702 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2022-02-14 15:47:30,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:47:30,703 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2022-02-14 15:47:30,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-14 15:47:30,703 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:30,703 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:30,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-14 15:47:30,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:30,904 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:30,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:30,904 INFO L85 PathProgramCache]: Analyzing trace with hash 606005414, now seen corresponding path program 27 times [2022-02-14 15:47:30,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:30,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526762201] [2022-02-14 15:47:30,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:30,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:31,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:31,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-14 15:47:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:31,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:47:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:31,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:47:31,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:31,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:47:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:31,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:47:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:31,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:47:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:31,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:47:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:31,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:47:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 94 proven. 46 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:31,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:31,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526762201] [2022-02-14 15:47:31,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526762201] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:31,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507318004] [2022-02-14 15:47:31,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:47:31,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:31,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:31,128 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:31,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-14 15:47:31,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-02-14 15:47:31,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:31,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-14 15:47:31,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:31,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:31,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507318004] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:31,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:31,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 44 [2022-02-14 15:47:31,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779382125] [2022-02-14 15:47:31,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:31,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-14 15:47:31,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:31,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-14 15:47:31,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1561, Unknown=0, NotChecked=0, Total=1892 [2022-02-14 15:47:31,789 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:47:32,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:32,715 INFO L93 Difference]: Finished difference Result 241 states and 291 transitions. [2022-02-14 15:47:32,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-14 15:47:32,716 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 81 [2022-02-14 15:47:32,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:32,717 INFO L225 Difference]: With dead ends: 241 [2022-02-14 15:47:32,717 INFO L226 Difference]: Without dead ends: 206 [2022-02-14 15:47:32,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1161, Invalid=5319, Unknown=0, NotChecked=0, Total=6480 [2022-02-14 15:47:32,718 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 81 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:32,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 102 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:47:32,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-14 15:47:32,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 101. [2022-02-14 15:47:32,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 80 states have internal predecessors, (91), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:47:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2022-02-14 15:47:32,781 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 81 [2022-02-14 15:47:32,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:32,781 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2022-02-14 15:47:32,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:47:32,781 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2022-02-14 15:47:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-14 15:47:32,782 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:32,782 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:32,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-02-14 15:47:32,982 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,SelfDestructingSolverStorable51 [2022-02-14 15:47:32,982 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:32,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:32,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1920145413, now seen corresponding path program 28 times [2022-02-14 15:47:32,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:32,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531687888] [2022-02-14 15:47:32,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:32,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:33,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:33,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-14 15:47:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:33,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:47:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:33,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:47:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:33,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:47:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:33,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:47:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:33,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:47:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:33,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:47:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:33,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:47:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:33,203 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 94 proven. 51 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:33,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:33,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531687888] [2022-02-14 15:47:33,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531687888] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:33,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645402936] [2022-02-14 15:47:33,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:47:33,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:33,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:33,208 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:33,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-14 15:47:33,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:47:33,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:33,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-14 15:47:33,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:33,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:33,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645402936] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:33,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:33,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 45 [2022-02-14 15:47:33,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146126174] [2022-02-14 15:47:33,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:33,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-14 15:47:33,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:33,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-14 15:47:33,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=1625, Unknown=0, NotChecked=0, Total=1980 [2022-02-14 15:47:33,987 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:47:34,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:34,787 INFO L93 Difference]: Finished difference Result 208 states and 248 transitions. [2022-02-14 15:47:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-14 15:47:34,791 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 81 [2022-02-14 15:47:34,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:34,792 INFO L225 Difference]: With dead ends: 208 [2022-02-14 15:47:34,792 INFO L226 Difference]: Without dead ends: 173 [2022-02-14 15:47:34,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1012, Invalid=4538, Unknown=0, NotChecked=0, Total=5550 [2022-02-14 15:47:34,793 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 78 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:34,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 74 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:47:34,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-14 15:47:34,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 101. [2022-02-14 15:47:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 80 states have internal predecessors, (91), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:47:34,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2022-02-14 15:47:34,867 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 81 [2022-02-14 15:47:34,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:34,867 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2022-02-14 15:47:34,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:47:34,867 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2022-02-14 15:47:34,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-14 15:47:34,867 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:34,868 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:34,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-14 15:47:35,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:35,068 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:35,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:35,069 INFO L85 PathProgramCache]: Analyzing trace with hash -291187578, now seen corresponding path program 8 times [2022-02-14 15:47:35,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:35,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942078077] [2022-02-14 15:47:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:35,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:35,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:35,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:35,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-14 15:47:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:35,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:47:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:35,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:47:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:35,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:47:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:35,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:47:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:35,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:47:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:35,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:47:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:35,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:47:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 94 proven. 58 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:35,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:35,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942078077] [2022-02-14 15:47:35,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942078077] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:35,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840339255] [2022-02-14 15:47:35,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:47:35,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:35,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:35,271 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:35,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-14 15:47:35,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:47:35,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:35,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-14 15:47:35,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:35,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:35,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840339255] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:35,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:35,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-02-14 15:47:35,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117663487] [2022-02-14 15:47:35,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:35,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-14 15:47:35,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:35,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-14 15:47:35,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1687, Unknown=0, NotChecked=0, Total=2070 [2022-02-14 15:47:35,950 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 46 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 45 states have internal predecessors, (78), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:47:36,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:36,528 INFO L93 Difference]: Finished difference Result 174 states and 204 transitions. [2022-02-14 15:47:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-14 15:47:36,528 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 45 states have internal predecessors, (78), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 81 [2022-02-14 15:47:36,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:36,529 INFO L225 Difference]: With dead ends: 174 [2022-02-14 15:47:36,529 INFO L226 Difference]: Without dead ends: 139 [2022-02-14 15:47:36,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=852, Invalid=3570, Unknown=0, NotChecked=0, Total=4422 [2022-02-14 15:47:36,530 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:36,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 86 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:47:36,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-14 15:47:36,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 103. [2022-02-14 15:47:36,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 82 states have internal predecessors, (93), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:47:36,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2022-02-14 15:47:36,622 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 81 [2022-02-14 15:47:36,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:36,622 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2022-02-14 15:47:36,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 45 states have internal predecessors, (78), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:47:36,622 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2022-02-14 15:47:36,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-14 15:47:36,623 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:36,623 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:36,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-02-14 15:47:36,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-02-14 15:47:36,823 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:36,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:36,824 INFO L85 PathProgramCache]: Analyzing trace with hash 529550340, now seen corresponding path program 16 times [2022-02-14 15:47:36,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:36,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6362285] [2022-02-14 15:47:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:36,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:36,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:36,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 15:47:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:36,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:47:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:36,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:47:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:36,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:47:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:36,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:47:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:36,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:47:36,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:36,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:47:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:36,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:47:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 52 proven. 109 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:36,936 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:36,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6362285] [2022-02-14 15:47:36,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6362285] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:36,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469055110] [2022-02-14 15:47:36,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:47:36,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:36,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:36,938 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:36,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-14 15:47:36,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:47:36,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:36,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-14 15:47:36,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 61 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:37,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 61 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 15:47:37,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469055110] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:37,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:37,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 18 [2022-02-14 15:47:37,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392590441] [2022-02-14 15:47:37,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:37,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 15:47:37,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:37,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 15:47:37,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-02-14 15:47:37,237 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 10 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 15:47:37,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:37,575 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2022-02-14 15:47:37,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-14 15:47:37,575 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 10 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 82 [2022-02-14 15:47:37,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:37,576 INFO L225 Difference]: With dead ends: 116 [2022-02-14 15:47:37,576 INFO L226 Difference]: Without dead ends: 114 [2022-02-14 15:47:37,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2022-02-14 15:47:37,576 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 78 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:37,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 67 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:47:37,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-02-14 15:47:37,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2022-02-14 15:47:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 15:47:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-02-14 15:47:37,663 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 82 [2022-02-14 15:47:37,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:37,663 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-02-14 15:47:37,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 10 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 15:47:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-02-14 15:47:37,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-14 15:47:37,664 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:37,664 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:37,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-14 15:47:37,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-02-14 15:47:37,879 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:37,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:37,880 INFO L85 PathProgramCache]: Analyzing trace with hash -8656861, now seen corresponding path program 17 times [2022-02-14 15:47:37,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:37,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042605051] [2022-02-14 15:47:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:37,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:38,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:38,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 15:47:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:38,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:47:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:38,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:47:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:38,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:47:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:38,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:47:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:38,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:47:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:38,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:47:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:38,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:47:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:38,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:47:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:38,090 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 119 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:38,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:38,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042605051] [2022-02-14 15:47:38,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042605051] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:38,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223153088] [2022-02-14 15:47:38,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:47:38,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:38,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:38,092 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:38,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-14 15:47:38,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-02-14 15:47:38,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:38,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-14 15:47:38,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:38,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:38,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223153088] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:38,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:38,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 41 [2022-02-14 15:47:38,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474241796] [2022-02-14 15:47:38,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:38,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-14 15:47:38,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:38,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-14 15:47:38,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1322, Unknown=0, NotChecked=0, Total=1640 [2022-02-14 15:47:38,782 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 states have internal predecessors, (75), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:47:40,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:40,146 INFO L93 Difference]: Finished difference Result 497 states and 629 transitions. [2022-02-14 15:47:40,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-14 15:47:40,147 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 states have internal predecessors, (75), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-02-14 15:47:40,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:40,149 INFO L225 Difference]: With dead ends: 497 [2022-02-14 15:47:40,149 INFO L226 Difference]: Without dead ends: 459 [2022-02-14 15:47:40,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1226, Invalid=5416, Unknown=0, NotChecked=0, Total=6642 [2022-02-14 15:47:40,150 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 216 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:40,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 109 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:47:40,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-02-14 15:47:40,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 111. [2022-02-14 15:47:40,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 15:47:40,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2022-02-14 15:47:40,244 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 89 [2022-02-14 15:47:40,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:40,244 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2022-02-14 15:47:40,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 states have internal predecessors, (75), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:47:40,244 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2022-02-14 15:47:40,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-14 15:47:40,244 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:40,245 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:40,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-14 15:47:40,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:40,446 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:40,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:40,446 INFO L85 PathProgramCache]: Analyzing trace with hash 2074977444, now seen corresponding path program 29 times [2022-02-14 15:47:40,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:40,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978077017] [2022-02-14 15:47:40,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:40,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:40,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:40,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 15:47:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:40,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:47:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:40,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:47:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:40,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:47:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:40,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:47:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:40,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:47:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:40,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:47:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:40,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:47:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:40,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:47:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 119 proven. 62 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:40,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:40,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978077017] [2022-02-14 15:47:40,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978077017] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:40,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743876576] [2022-02-14 15:47:40,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:47:40,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:40,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:40,652 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:40,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-14 15:47:40,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-02-14 15:47:40,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:40,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-14 15:47:40,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:41,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:41,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743876576] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:41,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:41,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 42 [2022-02-14 15:47:41,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131575601] [2022-02-14 15:47:41,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:41,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-14 15:47:41,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:41,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-14 15:47:41,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2022-02-14 15:47:41,316 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:47:42,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:42,696 INFO L93 Difference]: Finished difference Result 467 states and 588 transitions. [2022-02-14 15:47:42,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-14 15:47:42,697 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-02-14 15:47:42,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:42,698 INFO L225 Difference]: With dead ends: 467 [2022-02-14 15:47:42,698 INFO L226 Difference]: Without dead ends: 429 [2022-02-14 15:47:42,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1402, Invalid=6430, Unknown=0, NotChecked=0, Total=7832 [2022-02-14 15:47:42,699 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 180 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:42,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 99 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:47:42,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-02-14 15:47:42,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 111. [2022-02-14 15:47:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 15:47:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2022-02-14 15:47:42,777 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 89 [2022-02-14 15:47:42,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:42,777 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2022-02-14 15:47:42,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:47:42,777 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2022-02-14 15:47:42,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-14 15:47:42,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:42,777 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:42,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-02-14 15:47:42,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:42,978 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:42,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:42,978 INFO L85 PathProgramCache]: Analyzing trace with hash -2051835837, now seen corresponding path program 30 times [2022-02-14 15:47:42,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:42,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133383391] [2022-02-14 15:47:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:42,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:43,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:43,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 15:47:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:43,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:47:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:43,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:47:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:43,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:47:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:43,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:47:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:43,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:47:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:43,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:47:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:43,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:47:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:43,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:47:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 119 proven. 56 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:43,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:43,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133383391] [2022-02-14 15:47:43,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133383391] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:43,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973208314] [2022-02-14 15:47:43,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:47:43,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:43,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:43,187 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:43,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-14 15:47:43,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-02-14 15:47:43,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:43,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-14 15:47:43,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:43,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:43,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973208314] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:43,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:43,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 43 [2022-02-14 15:47:43,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019820680] [2022-02-14 15:47:43,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:43,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-14 15:47:43,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:43,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-14 15:47:43,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2022-02-14 15:47:43,858 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:47:45,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:45,340 INFO L93 Difference]: Finished difference Result 436 states and 546 transitions. [2022-02-14 15:47:45,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-14 15:47:45,340 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-02-14 15:47:45,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:45,342 INFO L225 Difference]: With dead ends: 436 [2022-02-14 15:47:45,342 INFO L226 Difference]: Without dead ends: 398 [2022-02-14 15:47:45,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2913 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1550, Invalid=7192, Unknown=0, NotChecked=0, Total=8742 [2022-02-14 15:47:45,342 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 159 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:45,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 129 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:47:45,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-02-14 15:47:45,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 111. [2022-02-14 15:47:45,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 15:47:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2022-02-14 15:47:45,423 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 89 [2022-02-14 15:47:45,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:45,424 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2022-02-14 15:47:45,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:47:45,424 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2022-02-14 15:47:45,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-14 15:47:45,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:45,424 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:45,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-02-14 15:47:45,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:45,625 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:45,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1134028668, now seen corresponding path program 31 times [2022-02-14 15:47:45,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:45,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091407889] [2022-02-14 15:47:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:45,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:45,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:45,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 15:47:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:45,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:47:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:45,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:47:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:45,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:47:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:45,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:47:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:45,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:47:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:45,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:47:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:45,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:47:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:45,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:47:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 119 proven. 52 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:45,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:45,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091407889] [2022-02-14 15:47:45,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091407889] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:45,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276927912] [2022-02-14 15:47:45,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:47:45,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:45,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:45,870 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:45,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-14 15:47:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:45,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-14 15:47:45,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:46,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:46,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276927912] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:46,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:46,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 44 [2022-02-14 15:47:46,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703583728] [2022-02-14 15:47:46,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:46,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-14 15:47:46,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:46,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-14 15:47:46,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1565, Unknown=0, NotChecked=0, Total=1892 [2022-02-14 15:47:46,672 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 43 states have internal predecessors, (78), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:47:48,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:48,141 INFO L93 Difference]: Finished difference Result 404 states and 503 transitions. [2022-02-14 15:47:48,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-14 15:47:48,142 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 43 states have internal predecessors, (78), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-02-14 15:47:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:48,143 INFO L225 Difference]: With dead ends: 404 [2022-02-14 15:47:48,143 INFO L226 Difference]: Without dead ends: 366 [2022-02-14 15:47:48,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3117 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1644, Invalid=7668, Unknown=0, NotChecked=0, Total=9312 [2022-02-14 15:47:48,144 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 142 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:48,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 124 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:47:48,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-02-14 15:47:48,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 111. [2022-02-14 15:47:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 15:47:48,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2022-02-14 15:47:48,220 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 89 [2022-02-14 15:47:48,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:48,221 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2022-02-14 15:47:48,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 43 states have internal predecessors, (78), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:47:48,221 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2022-02-14 15:47:48,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-14 15:47:48,221 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:48,221 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:48,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-14 15:47:48,423 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,SelfDestructingSolverStorable58 [2022-02-14 15:47:48,423 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:48,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:48,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1548189795, now seen corresponding path program 32 times [2022-02-14 15:47:48,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:48,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029396869] [2022-02-14 15:47:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:48,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:48,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:48,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 15:47:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:48,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:47:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:48,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:47:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:48,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:47:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:48,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:47:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:48,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:47:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:48,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:47:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:48,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:47:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:48,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:47:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 119 proven. 50 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:48,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:48,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029396869] [2022-02-14 15:47:48,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029396869] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:48,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897906698] [2022-02-14 15:47:48,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:47:48,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:48,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:48,680 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:48,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-14 15:47:48,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:47:48,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:48,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-14 15:47:48,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:49,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:49,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897906698] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:49,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:49,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 45 [2022-02-14 15:47:49,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327334818] [2022-02-14 15:47:49,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:49,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-14 15:47:49,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:49,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-14 15:47:49,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1642, Unknown=0, NotChecked=0, Total=1980 [2022-02-14 15:47:49,405 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:47:50,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:50,804 INFO L93 Difference]: Finished difference Result 371 states and 459 transitions. [2022-02-14 15:47:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-14 15:47:50,804 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-02-14 15:47:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:50,806 INFO L225 Difference]: With dead ends: 371 [2022-02-14 15:47:50,806 INFO L226 Difference]: Without dead ends: 333 [2022-02-14 15:47:50,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3174 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1675, Invalid=7831, Unknown=0, NotChecked=0, Total=9506 [2022-02-14 15:47:50,807 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 123 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:50,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 88 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:47:50,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-02-14 15:47:50,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 111. [2022-02-14 15:47:50,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 15:47:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2022-02-14 15:47:50,886 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 89 [2022-02-14 15:47:50,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:50,886 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2022-02-14 15:47:50,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:47:50,887 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2022-02-14 15:47:50,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-14 15:47:50,887 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:50,887 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:50,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-02-14 15:47:51,087 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,SelfDestructingSolverStorable59 [2022-02-14 15:47:51,088 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:51,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:51,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1202383772, now seen corresponding path program 33 times [2022-02-14 15:47:51,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:51,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263536248] [2022-02-14 15:47:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:51,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:51,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:51,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 15:47:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:51,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:47:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:51,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:47:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:51,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:47:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:51,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:47:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:51,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:47:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:51,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:47:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:51,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:47:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:51,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:47:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 119 proven. 50 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:51,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:51,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263536248] [2022-02-14 15:47:51,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263536248] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:51,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244171778] [2022-02-14 15:47:51,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:47:51,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:51,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:51,328 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:51,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-14 15:47:51,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-02-14 15:47:51,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:51,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-14 15:47:51,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:51,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:52,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244171778] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:52,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:52,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 46 [2022-02-14 15:47:52,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944659704] [2022-02-14 15:47:52,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:52,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-14 15:47:52,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:52,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-14 15:47:52,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1717, Unknown=0, NotChecked=0, Total=2070 [2022-02-14 15:47:52,053 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:47:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:53,440 INFO L93 Difference]: Finished difference Result 337 states and 414 transitions. [2022-02-14 15:47:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-14 15:47:53,440 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-02-14 15:47:53,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:53,441 INFO L225 Difference]: With dead ends: 337 [2022-02-14 15:47:53,441 INFO L226 Difference]: Without dead ends: 299 [2022-02-14 15:47:53,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1640, Invalid=7672, Unknown=0, NotChecked=0, Total=9312 [2022-02-14 15:47:53,442 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 110 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:53,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 111 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:47:53,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-02-14 15:47:53,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 111. [2022-02-14 15:47:53,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 15:47:53,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2022-02-14 15:47:53,529 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 89 [2022-02-14 15:47:53,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:53,529 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2022-02-14 15:47:53,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:47:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2022-02-14 15:47:53,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-14 15:47:53,530 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:53,530 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:53,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-14 15:47:53,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:53,753 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:53,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:53,754 INFO L85 PathProgramCache]: Analyzing trace with hash -570818429, now seen corresponding path program 34 times [2022-02-14 15:47:53,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:53,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793497995] [2022-02-14 15:47:53,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:53,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:53,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:53,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 15:47:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:53,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:47:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:53,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:47:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:53,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:47:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:53,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:47:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:53,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:47:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:53,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:47:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:53,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:47:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:53,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:47:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 119 proven. 52 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:53,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:53,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793497995] [2022-02-14 15:47:53,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793497995] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:53,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790134673] [2022-02-14 15:47:53,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:47:53,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:53,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:53,961 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:53,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-14 15:47:54,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:47:54,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:54,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-14 15:47:54,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:54,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:54,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790134673] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:54,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:54,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 47 [2022-02-14 15:47:54,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497067607] [2022-02-14 15:47:54,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:54,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-14 15:47:54,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:54,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-14 15:47:54,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2022-02-14 15:47:54,678 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 47 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 46 states have internal predecessors, (81), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:47:55,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:55,901 INFO L93 Difference]: Finished difference Result 302 states and 368 transitions. [2022-02-14 15:47:55,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-14 15:47:55,903 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 46 states have internal predecessors, (81), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-02-14 15:47:55,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:55,904 INFO L225 Difference]: With dead ends: 302 [2022-02-14 15:47:55,904 INFO L226 Difference]: Without dead ends: 264 [2022-02-14 15:47:55,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2873 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1542, Invalid=7200, Unknown=0, NotChecked=0, Total=8742 [2022-02-14 15:47:55,905 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 112 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:55,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 91 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:47:55,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-02-14 15:47:56,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 111. [2022-02-14 15:47:56,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 15:47:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2022-02-14 15:47:56,025 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 89 [2022-02-14 15:47:56,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:56,025 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2022-02-14 15:47:56,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 46 states have internal predecessors, (81), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:47:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2022-02-14 15:47:56,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-14 15:47:56,026 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:56,026 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:56,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-14 15:47:56,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:56,239 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:56,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:56,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1827838020, now seen corresponding path program 35 times [2022-02-14 15:47:56,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:56,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385483589] [2022-02-14 15:47:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:56,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:56,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:56,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:56,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 15:47:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:56,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:47:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:56,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:47:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:56,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:47:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:56,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:47:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:56,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:47:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:56,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:47:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:56,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:47:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:56,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:47:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 119 proven. 56 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:56,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:56,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385483589] [2022-02-14 15:47:56,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385483589] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:56,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775267833] [2022-02-14 15:47:56,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:47:56,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:56,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:56,488 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:56,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-14 15:47:56,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-02-14 15:47:56,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:56,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-14 15:47:56,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:57,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:57,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775267833] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:57,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:57,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 48 [2022-02-14 15:47:57,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806613833] [2022-02-14 15:47:57,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:57,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-14 15:47:57,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:57,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-14 15:47:57,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1861, Unknown=0, NotChecked=0, Total=2256 [2022-02-14 15:47:57,233 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 48 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 47 states have internal predecessors, (82), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:47:58,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:47:58,306 INFO L93 Difference]: Finished difference Result 266 states and 321 transitions. [2022-02-14 15:47:58,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-14 15:47:58,307 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 47 states have internal predecessors, (82), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-02-14 15:47:58,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:47:58,307 INFO L225 Difference]: With dead ends: 266 [2022-02-14 15:47:58,307 INFO L226 Difference]: Without dead ends: 228 [2022-02-14 15:47:58,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1390, Invalid=6442, Unknown=0, NotChecked=0, Total=7832 [2022-02-14 15:47:58,308 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 88 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:47:58,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 94 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:47:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-02-14 15:47:58,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 111. [2022-02-14 15:47:58,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 15:47:58,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2022-02-14 15:47:58,400 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 89 [2022-02-14 15:47:58,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:47:58,401 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2022-02-14 15:47:58,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 47 states have internal predecessors, (82), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:47:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2022-02-14 15:47:58,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-14 15:47:58,401 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:47:58,401 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:47:58,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-14 15:47:58,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:58,602 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:47:58,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:47:58,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1123223389, now seen corresponding path program 36 times [2022-02-14 15:47:58,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:47:58,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074517871] [2022-02-14 15:47:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:47:58,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:47:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:58,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:47:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:58,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 15:47:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:58,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:47:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:58,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:47:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:58,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:47:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:58,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:47:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:58,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:47:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:58,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:47:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:58,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:47:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:58,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:47:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:47:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 119 proven. 62 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:58,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:47:58,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074517871] [2022-02-14 15:47:58,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074517871] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:47:58,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774197372] [2022-02-14 15:47:58,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:47:58,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:47:58,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:47:58,826 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:47:58,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-14 15:47:58,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-02-14 15:47:58,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:47:58,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-14 15:47:58,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:47:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:59,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:47:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:47:59,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774197372] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:47:59,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:47:59,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 49 [2022-02-14 15:47:59,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965226330] [2022-02-14 15:47:59,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:47:59,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-14 15:47:59,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:47:59,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-14 15:47:59,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1930, Unknown=0, NotChecked=0, Total=2352 [2022-02-14 15:47:59,596 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 49 states, 49 states have (on average 1.6938775510204083) internal successors, (83), 48 states have internal predecessors, (83), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:48:00,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:00,490 INFO L93 Difference]: Finished difference Result 229 states and 273 transitions. [2022-02-14 15:48:00,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-14 15:48:00,490 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6938775510204083) internal successors, (83), 48 states have internal predecessors, (83), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-02-14 15:48:00,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:00,491 INFO L225 Difference]: With dead ends: 229 [2022-02-14 15:48:00,491 INFO L226 Difference]: Without dead ends: 191 [2022-02-14 15:48:00,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1199, Invalid=5443, Unknown=0, NotChecked=0, Total=6642 [2022-02-14 15:48:00,492 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 65 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:00,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 81 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:48:00,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-02-14 15:48:00,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 111. [2022-02-14 15:48:00,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 15:48:00,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2022-02-14 15:48:00,586 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 89 [2022-02-14 15:48:00,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:00,586 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2022-02-14 15:48:00,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6938775510204083) internal successors, (83), 48 states have internal predecessors, (83), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:48:00,586 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2022-02-14 15:48:00,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-14 15:48:00,587 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:00,587 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:00,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-02-14 15:48:00,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:00,788 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:00,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:00,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1883153444, now seen corresponding path program 9 times [2022-02-14 15:48:00,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:00,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039450271] [2022-02-14 15:48:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:00,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:00,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:00,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 15:48:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:00,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:48:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:00,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:48:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:00,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:48:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:00,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:48:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:00,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:48:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:00,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:48:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:00,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:48:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:00,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:48:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 119 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:48:01,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:01,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039450271] [2022-02-14 15:48:01,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039450271] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:01,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739281322] [2022-02-14 15:48:01,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:48:01,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:01,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:01,001 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:01,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-14 15:48:01,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-02-14 15:48:01,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:48:01,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-14 15:48:01,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:48:01,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:48:01,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739281322] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:01,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:01,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-02-14 15:48:01,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063549487] [2022-02-14 15:48:01,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:01,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-14 15:48:01,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:01,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-14 15:48:01,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1997, Unknown=0, NotChecked=0, Total=2450 [2022-02-14 15:48:01,819 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 50 states, 50 states have (on average 1.68) internal successors, (84), 49 states have internal predecessors, (84), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:48:02,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:02,525 INFO L93 Difference]: Finished difference Result 191 states and 224 transitions. [2022-02-14 15:48:02,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-14 15:48:02,525 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.68) internal successors, (84), 49 states have internal predecessors, (84), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-02-14 15:48:02,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:02,526 INFO L225 Difference]: With dead ends: 191 [2022-02-14 15:48:02,526 INFO L226 Difference]: Without dead ends: 153 [2022-02-14 15:48:02,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1001, Invalid=4255, Unknown=0, NotChecked=0, Total=5256 [2022-02-14 15:48:02,527 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:02,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 67 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:48:02,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-02-14 15:48:02,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 113. [2022-02-14 15:48:02,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 89 states have (on average 1.146067415730337) internal successors, (102), 90 states have internal predecessors, (102), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 15:48:02,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2022-02-14 15:48:02,630 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 89 [2022-02-14 15:48:02,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:02,630 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2022-02-14 15:48:02,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.68) internal successors, (84), 49 states have internal predecessors, (84), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-14 15:48:02,631 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2022-02-14 15:48:02,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-02-14 15:48:02,631 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:02,631 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:02,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-02-14 15:48:02,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-14 15:48:02,832 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:02,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:02,832 INFO L85 PathProgramCache]: Analyzing trace with hash -750780127, now seen corresponding path program 18 times [2022-02-14 15:48:02,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:02,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531798202] [2022-02-14 15:48:02,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:02,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:02,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:02,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:48:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:02,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 15:48:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:02,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 15:48:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:02,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-14 15:48:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:02,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-14 15:48:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:02,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-14 15:48:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:02,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-14 15:48:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:02,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-02-14 15:48:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:02,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 15:48:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 63 proven. 136 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:48:02,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:02,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531798202] [2022-02-14 15:48:02,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531798202] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:02,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372959114] [2022-02-14 15:48:02,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:48:02,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:02,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:02,944 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:02,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-14 15:48:02,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-02-14 15:48:02,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:48:02,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-14 15:48:02,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:03,125 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 73 proven. 126 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:48:03,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 73 proven. 126 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-14 15:48:03,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372959114] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:03,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:03,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 19 [2022-02-14 15:48:03,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700013130] [2022-02-14 15:48:03,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:03,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-14 15:48:03,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:03,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-14 15:48:03,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-02-14 15:48:03,257 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:48:03,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:03,657 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2022-02-14 15:48:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-14 15:48:03,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 90 [2022-02-14 15:48:03,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:03,658 INFO L225 Difference]: With dead ends: 126 [2022-02-14 15:48:03,658 INFO L226 Difference]: Without dead ends: 124 [2022-02-14 15:48:03,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2022-02-14 15:48:03,659 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 78 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:03,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 79 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:48:03,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-02-14 15:48:03,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2022-02-14 15:48:03,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:48:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2022-02-14 15:48:03,764 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 90 [2022-02-14 15:48:03,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:03,764 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2022-02-14 15:48:03,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:48:03,764 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2022-02-14 15:48:03,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-14 15:48:03,764 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:03,764 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:03,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-02-14 15:48:03,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:03,965 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:03,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:03,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1842829210, now seen corresponding path program 19 times [2022-02-14 15:48:03,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:03,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333733053] [2022-02-14 15:48:03,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:03,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:04,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:04,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:48:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:04,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 15:48:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:04,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 15:48:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:04,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-14 15:48:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:04,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-14 15:48:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:04,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-14 15:48:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:04,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-14 15:48:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:04,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-02-14 15:48:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:04,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 15:48:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:04,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-14 15:48:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 147 proven. 83 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:04,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:04,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333733053] [2022-02-14 15:48:04,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333733053] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:04,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005096174] [2022-02-14 15:48:04,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:48:04,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:04,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:04,209 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:04,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-14 15:48:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:04,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-14 15:48:04,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:04,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:04,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005096174] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:04,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:04,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 44 [2022-02-14 15:48:04,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878537210] [2022-02-14 15:48:04,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:04,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-14 15:48:04,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:04,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-14 15:48:04,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2022-02-14 15:48:04,941 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 43 states have internal predecessors, (80), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:06,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:06,694 INFO L93 Difference]: Finished difference Result 583 states and 739 transitions. [2022-02-14 15:48:06,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-14 15:48:06,695 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 43 states have internal predecessors, (80), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-02-14 15:48:06,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:06,696 INFO L225 Difference]: With dead ends: 583 [2022-02-14 15:48:06,696 INFO L226 Difference]: Without dead ends: 542 [2022-02-14 15:48:06,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1432, Invalid=6400, Unknown=0, NotChecked=0, Total=7832 [2022-02-14 15:48:06,697 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 250 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:06,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 111 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:48:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-02-14 15:48:06,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 121. [2022-02-14 15:48:06,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 96 states have internal predecessors, (109), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:48:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2022-02-14 15:48:06,812 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 97 [2022-02-14 15:48:06,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:06,812 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2022-02-14 15:48:06,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 43 states have internal predecessors, (80), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:06,812 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2022-02-14 15:48:06,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-14 15:48:06,813 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:06,813 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:06,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-02-14 15:48:07,013 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,SelfDestructingSolverStorable66 [2022-02-14 15:48:07,013 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:07,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:07,014 INFO L85 PathProgramCache]: Analyzing trace with hash -498923323, now seen corresponding path program 37 times [2022-02-14 15:48:07,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:07,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983125455] [2022-02-14 15:48:07,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:07,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:07,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:07,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:48:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:07,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 15:48:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:07,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 15:48:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:07,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-14 15:48:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:07,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-14 15:48:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:07,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-14 15:48:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:07,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-14 15:48:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:07,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-02-14 15:48:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:07,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 15:48:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:07,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-14 15:48:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 147 proven. 74 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:07,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:07,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983125455] [2022-02-14 15:48:07,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983125455] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:07,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282170849] [2022-02-14 15:48:07,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:48:07,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:07,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:07,268 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:07,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-14 15:48:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:07,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-14 15:48:07,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:07,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:08,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282170849] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:08,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:08,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 45 [2022-02-14 15:48:08,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158768316] [2022-02-14 15:48:08,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:08,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-14 15:48:08,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:08,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-14 15:48:08,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1613, Unknown=0, NotChecked=0, Total=1980 [2022-02-14 15:48:08,006 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 45 states, 45 states have (on average 1.8) internal successors, (81), 44 states have internal predecessors, (81), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:09,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:09,868 INFO L93 Difference]: Finished difference Result 550 states and 694 transitions. [2022-02-14 15:48:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-14 15:48:09,869 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8) internal successors, (81), 44 states have internal predecessors, (81), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-02-14 15:48:09,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:09,871 INFO L225 Difference]: With dead ends: 550 [2022-02-14 15:48:09,871 INFO L226 Difference]: Without dead ends: 509 [2022-02-14 15:48:09,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3079 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1654, Invalid=7658, Unknown=0, NotChecked=0, Total=9312 [2022-02-14 15:48:09,872 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 231 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:09,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 121 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:48:09,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-02-14 15:48:10,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 121. [2022-02-14 15:48:10,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 96 states have internal predecessors, (109), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:48:10,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2022-02-14 15:48:10,029 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 97 [2022-02-14 15:48:10,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:10,030 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2022-02-14 15:48:10,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8) internal successors, (81), 44 states have internal predecessors, (81), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:10,030 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2022-02-14 15:48:10,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-14 15:48:10,030 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:10,030 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:10,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-14 15:48:10,254 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,SelfDestructingSolverStorable67 [2022-02-14 15:48:10,254 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:10,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:10,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1787513786, now seen corresponding path program 38 times [2022-02-14 15:48:10,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:10,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315573467] [2022-02-14 15:48:10,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:10,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:10,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:10,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:48:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:10,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 15:48:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:10,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 15:48:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:10,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-14 15:48:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:10,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-14 15:48:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:10,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-14 15:48:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:10,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-14 15:48:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:10,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-02-14 15:48:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:10,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 15:48:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:10,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-14 15:48:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 147 proven. 67 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:10,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:10,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315573467] [2022-02-14 15:48:10,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315573467] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:10,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466181938] [2022-02-14 15:48:10,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:48:10,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:10,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:10,485 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:10,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-14 15:48:10,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:48:10,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:48:10,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-14 15:48:10,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:11,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:11,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466181938] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:11,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:11,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 46 [2022-02-14 15:48:11,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715535900] [2022-02-14 15:48:11,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:11,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-14 15:48:11,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:11,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-14 15:48:11,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2022-02-14 15:48:11,216 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 46 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 45 states have internal predecessors, (82), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:13,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:13,071 INFO L93 Difference]: Finished difference Result 516 states and 648 transitions. [2022-02-14 15:48:13,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-14 15:48:13,071 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 45 states have internal predecessors, (82), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-02-14 15:48:13,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:13,072 INFO L225 Difference]: With dead ends: 516 [2022-02-14 15:48:13,072 INFO L226 Difference]: Without dead ends: 475 [2022-02-14 15:48:13,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3573 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1850, Invalid=8656, Unknown=0, NotChecked=0, Total=10506 [2022-02-14 15:48:13,073 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 184 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:13,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 119 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:48:13,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-02-14 15:48:13,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 121. [2022-02-14 15:48:13,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 96 states have internal predecessors, (109), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:48:13,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2022-02-14 15:48:13,210 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 97 [2022-02-14 15:48:13,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:13,210 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2022-02-14 15:48:13,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 45 states have internal predecessors, (82), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:13,210 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2022-02-14 15:48:13,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-14 15:48:13,211 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:13,211 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:13,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-02-14 15:48:13,425 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,SelfDestructingSolverStorable68 [2022-02-14 15:48:13,425 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:13,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:13,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1215854821, now seen corresponding path program 39 times [2022-02-14 15:48:13,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:13,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047817834] [2022-02-14 15:48:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:13,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:13,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:13,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:48:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:13,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 15:48:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:13,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 15:48:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:13,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-14 15:48:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:13,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-14 15:48:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:13,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-14 15:48:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:13,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-14 15:48:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:13,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-02-14 15:48:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:13,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 15:48:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:13,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-14 15:48:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 147 proven. 62 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:13,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:13,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047817834] [2022-02-14 15:48:13,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047817834] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:13,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099320236] [2022-02-14 15:48:13,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:48:13,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:13,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:13,656 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:13,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-14 15:48:13,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-02-14 15:48:13,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:48:13,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-14 15:48:13,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:14,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:14,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099320236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:14,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:14,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 47 [2022-02-14 15:48:14,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455512127] [2022-02-14 15:48:14,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:14,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-14 15:48:14,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:14,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-14 15:48:14,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1787, Unknown=0, NotChecked=0, Total=2162 [2022-02-14 15:48:14,423 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 46 states have internal predecessors, (83), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:16,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:16,289 INFO L93 Difference]: Finished difference Result 481 states and 601 transitions. [2022-02-14 15:48:16,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-14 15:48:16,290 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 46 states have internal predecessors, (83), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-02-14 15:48:16,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:16,291 INFO L225 Difference]: With dead ends: 481 [2022-02-14 15:48:16,291 INFO L226 Difference]: Without dead ends: 440 [2022-02-14 15:48:16,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3883 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1990, Invalid=9352, Unknown=0, NotChecked=0, Total=11342 [2022-02-14 15:48:16,292 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 195 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:16,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 104 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:48:16,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-02-14 15:48:16,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 121. [2022-02-14 15:48:16,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 96 states have internal predecessors, (109), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:48:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2022-02-14 15:48:16,419 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 97 [2022-02-14 15:48:16,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:16,419 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2022-02-14 15:48:16,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 46 states have internal predecessors, (83), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:16,419 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2022-02-14 15:48:16,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-14 15:48:16,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:16,419 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:16,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-02-14 15:48:16,635 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,SelfDestructingSolverStorable69 [2022-02-14 15:48:16,635 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:16,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:16,636 INFO L85 PathProgramCache]: Analyzing trace with hash -168998874, now seen corresponding path program 40 times [2022-02-14 15:48:16,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:16,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051360552] [2022-02-14 15:48:16,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:16,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:16,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:16,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:48:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:16,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 15:48:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:16,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 15:48:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:16,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-14 15:48:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:16,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-14 15:48:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:16,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-14 15:48:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:16,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-14 15:48:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:16,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-02-14 15:48:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:16,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 15:48:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:16,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-14 15:48:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 147 proven. 59 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:16,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:16,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051360552] [2022-02-14 15:48:16,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051360552] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:16,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58650463] [2022-02-14 15:48:16,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:48:16,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:16,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:16,868 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:16,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-14 15:48:16,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:48:16,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:48:16,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-14 15:48:16,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:17,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:17,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58650463] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:17,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:17,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 48 [2022-02-14 15:48:17,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514808561] [2022-02-14 15:48:17,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:17,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-14 15:48:17,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:17,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-14 15:48:17,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1871, Unknown=0, NotChecked=0, Total=2256 [2022-02-14 15:48:17,631 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 48 states, 48 states have (on average 1.75) internal successors, (84), 47 states have internal predecessors, (84), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:19,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:19,481 INFO L93 Difference]: Finished difference Result 445 states and 553 transitions. [2022-02-14 15:48:19,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-14 15:48:19,482 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.75) internal successors, (84), 47 states have internal predecessors, (84), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-02-14 15:48:19,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:19,483 INFO L225 Difference]: With dead ends: 445 [2022-02-14 15:48:19,483 INFO L226 Difference]: Without dead ends: 404 [2022-02-14 15:48:19,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4026 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2062, Invalid=9710, Unknown=0, NotChecked=0, Total=11772 [2022-02-14 15:48:19,484 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 153 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:19,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 107 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:48:19,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-02-14 15:48:19,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 121. [2022-02-14 15:48:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 96 states have internal predecessors, (109), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:48:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2022-02-14 15:48:19,603 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 97 [2022-02-14 15:48:19,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:19,603 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2022-02-14 15:48:19,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.75) internal successors, (84), 47 states have internal predecessors, (84), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:19,603 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2022-02-14 15:48:19,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-14 15:48:19,604 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:19,604 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:19,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-02-14 15:48:19,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:19,808 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:19,808 INFO L85 PathProgramCache]: Analyzing trace with hash -149790459, now seen corresponding path program 41 times [2022-02-14 15:48:19,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:19,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007643531] [2022-02-14 15:48:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:19,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:20,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:20,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:48:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:20,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 15:48:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:20,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 15:48:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:20,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-14 15:48:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:20,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-14 15:48:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:20,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-14 15:48:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:20,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-14 15:48:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:20,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-02-14 15:48:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:20,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 15:48:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:20,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-14 15:48:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 147 proven. 58 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:20,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:20,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007643531] [2022-02-14 15:48:20,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007643531] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:20,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817551831] [2022-02-14 15:48:20,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:48:20,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:20,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:20,043 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:20,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-14 15:48:20,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-02-14 15:48:20,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:48:20,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-14 15:48:20,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 175 proven. 30 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:20,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 175 proven. 30 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:20,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817551831] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:20,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:20,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 49 [2022-02-14 15:48:20,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133922787] [2022-02-14 15:48:20,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:20,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-14 15:48:20,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:20,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-14 15:48:20,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1953, Unknown=0, NotChecked=0, Total=2352 [2022-02-14 15:48:20,819 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 48 states have internal predecessors, (85), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:22,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:22,652 INFO L93 Difference]: Finished difference Result 408 states and 504 transitions. [2022-02-14 15:48:22,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-14 15:48:22,652 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 48 states have internal predecessors, (85), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-02-14 15:48:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:22,654 INFO L225 Difference]: With dead ends: 408 [2022-02-14 15:48:22,654 INFO L226 Difference]: Without dead ends: 367 [2022-02-14 15:48:22,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4006 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2060, Invalid=9712, Unknown=0, NotChecked=0, Total=11772 [2022-02-14 15:48:22,655 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 131 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:22,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 115 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:48:22,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-02-14 15:48:22,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 121. [2022-02-14 15:48:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 96 states have internal predecessors, (109), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:48:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2022-02-14 15:48:22,787 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 97 [2022-02-14 15:48:22,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:22,787 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2022-02-14 15:48:22,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 48 states have internal predecessors, (85), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:22,787 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2022-02-14 15:48:22,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-14 15:48:22,787 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:22,787 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:22,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-14 15:48:23,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:23,011 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:23,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:23,011 INFO L85 PathProgramCache]: Analyzing trace with hash 445670406, now seen corresponding path program 42 times [2022-02-14 15:48:23,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:23,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513569006] [2022-02-14 15:48:23,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:23,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:23,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:23,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:48:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:23,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 15:48:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:23,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 15:48:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:23,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-14 15:48:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:23,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-14 15:48:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:23,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-14 15:48:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:23,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-14 15:48:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:23,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-02-14 15:48:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:23,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 15:48:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:23,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-14 15:48:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 147 proven. 59 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:23,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:23,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513569006] [2022-02-14 15:48:23,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513569006] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:23,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76815449] [2022-02-14 15:48:23,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:48:23,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:23,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:23,288 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:23,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-14 15:48:23,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-02-14 15:48:23,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:48:23,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-14 15:48:23,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:24,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:24,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76815449] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:24,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:24,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 50 [2022-02-14 15:48:24,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690237611] [2022-02-14 15:48:24,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:24,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-14 15:48:24,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:24,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-14 15:48:24,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2033, Unknown=0, NotChecked=0, Total=2450 [2022-02-14 15:48:24,224 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:25,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:25,956 INFO L93 Difference]: Finished difference Result 370 states and 454 transitions. [2022-02-14 15:48:25,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-14 15:48:25,956 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-02-14 15:48:25,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:25,957 INFO L225 Difference]: With dead ends: 370 [2022-02-14 15:48:25,957 INFO L226 Difference]: Without dead ends: 329 [2022-02-14 15:48:25,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1984, Invalid=9358, Unknown=0, NotChecked=0, Total=11342 [2022-02-14 15:48:25,958 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 124 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:25,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 105 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:48:25,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-02-14 15:48:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 121. [2022-02-14 15:48:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 96 states have internal predecessors, (109), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:48:26,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2022-02-14 15:48:26,079 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 97 [2022-02-14 15:48:26,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:26,079 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2022-02-14 15:48:26,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:26,079 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2022-02-14 15:48:26,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-14 15:48:26,080 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:26,080 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:26,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-02-14 15:48:26,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:26,280 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:26,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:26,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1725088037, now seen corresponding path program 43 times [2022-02-14 15:48:26,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:26,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731710426] [2022-02-14 15:48:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:26,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:26,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:26,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:48:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:26,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 15:48:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:26,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 15:48:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:26,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-14 15:48:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:26,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-14 15:48:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:26,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-14 15:48:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:26,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-14 15:48:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:26,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-02-14 15:48:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:26,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 15:48:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:26,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-14 15:48:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 147 proven. 62 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:26,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:26,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731710426] [2022-02-14 15:48:26,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731710426] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:26,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340677878] [2022-02-14 15:48:26,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:48:26,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:26,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:26,524 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:26,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-14 15:48:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:26,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-14 15:48:26,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:27,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:27,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340677878] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:27,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:27,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 51 [2022-02-14 15:48:27,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508575940] [2022-02-14 15:48:27,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:27,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-14 15:48:27,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:27,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-14 15:48:27,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=2111, Unknown=0, NotChecked=0, Total=2550 [2022-02-14 15:48:27,396 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 51 states, 51 states have (on average 1.7058823529411764) internal successors, (87), 50 states have internal predecessors, (87), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:29,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:29,102 INFO L93 Difference]: Finished difference Result 331 states and 403 transitions. [2022-02-14 15:48:29,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-14 15:48:29,102 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7058823529411764) internal successors, (87), 50 states have internal predecessors, (87), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-02-14 15:48:29,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:29,103 INFO L225 Difference]: With dead ends: 331 [2022-02-14 15:48:29,103 INFO L226 Difference]: Without dead ends: 290 [2022-02-14 15:48:29,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3508 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1840, Invalid=8666, Unknown=0, NotChecked=0, Total=10506 [2022-02-14 15:48:29,104 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 94 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:29,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 118 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:48:29,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-14 15:48:29,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 121. [2022-02-14 15:48:29,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 96 states have internal predecessors, (109), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:48:29,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2022-02-14 15:48:29,282 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 97 [2022-02-14 15:48:29,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:29,282 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2022-02-14 15:48:29,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7058823529411764) internal successors, (87), 50 states have internal predecessors, (87), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:29,283 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2022-02-14 15:48:29,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-14 15:48:29,283 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:29,283 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:29,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-14 15:48:29,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-02-14 15:48:29,500 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:29,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:29,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1562638362, now seen corresponding path program 44 times [2022-02-14 15:48:29,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:29,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045153788] [2022-02-14 15:48:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:29,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:29,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:29,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:48:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:29,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 15:48:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:29,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 15:48:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:29,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-14 15:48:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:29,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-14 15:48:29,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:29,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-14 15:48:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:29,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-14 15:48:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:29,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-02-14 15:48:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:29,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 15:48:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:29,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-14 15:48:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 147 proven. 67 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:29,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:29,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045153788] [2022-02-14 15:48:29,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045153788] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:29,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266424831] [2022-02-14 15:48:29,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:48:29,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:29,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:29,745 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:29,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-14 15:48:29,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:48:29,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:48:29,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-14 15:48:29,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:30,399 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:30,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:30,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266424831] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:30,572 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:30,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 52 [2022-02-14 15:48:30,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643028248] [2022-02-14 15:48:30,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:30,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-14 15:48:30,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:30,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-14 15:48:30,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=2187, Unknown=0, NotChecked=0, Total=2652 [2022-02-14 15:48:30,573 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 52 states, 52 states have (on average 1.6923076923076923) internal successors, (88), 51 states have internal predecessors, (88), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:31,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:31,914 INFO L93 Difference]: Finished difference Result 291 states and 351 transitions. [2022-02-14 15:48:31,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-14 15:48:31,914 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.6923076923076923) internal successors, (88), 51 states have internal predecessors, (88), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-02-14 15:48:31,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:31,915 INFO L225 Difference]: With dead ends: 291 [2022-02-14 15:48:31,915 INFO L226 Difference]: Without dead ends: 250 [2022-02-14 15:48:31,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3068 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1640, Invalid=7672, Unknown=0, NotChecked=0, Total=9312 [2022-02-14 15:48:31,916 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 81 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:31,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 85 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:48:31,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-14 15:48:32,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 121. [2022-02-14 15:48:32,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 96 states have internal predecessors, (109), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:48:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2022-02-14 15:48:32,094 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 97 [2022-02-14 15:48:32,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:32,094 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2022-02-14 15:48:32,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.6923076923076923) internal successors, (88), 51 states have internal predecessors, (88), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:32,094 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2022-02-14 15:48:32,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-14 15:48:32,095 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:32,095 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:32,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-02-14 15:48:32,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:32,303 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:32,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:32,304 INFO L85 PathProgramCache]: Analyzing trace with hash -402941627, now seen corresponding path program 45 times [2022-02-14 15:48:32,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:32,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824500922] [2022-02-14 15:48:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:32,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:32,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:32,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:48:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:32,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 15:48:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:32,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 15:48:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:32,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-14 15:48:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:32,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-14 15:48:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:32,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-14 15:48:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:32,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-14 15:48:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:32,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-02-14 15:48:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:32,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 15:48:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:32,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-14 15:48:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 147 proven. 74 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:32,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:32,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824500922] [2022-02-14 15:48:32,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824500922] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:32,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963559362] [2022-02-14 15:48:32,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:48:32,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:32,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:32,566 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:32,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-14 15:48:32,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-02-14 15:48:32,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:48:32,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-14 15:48:32,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:33,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:33,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963559362] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:33,432 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:33,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 53 [2022-02-14 15:48:33,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475579634] [2022-02-14 15:48:33,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:33,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-14 15:48:33,432 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:33,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-14 15:48:33,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=2261, Unknown=0, NotChecked=0, Total=2756 [2022-02-14 15:48:33,433 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 53 states, 53 states have (on average 1.679245283018868) internal successors, (89), 52 states have internal predecessors, (89), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:34,577 INFO L93 Difference]: Finished difference Result 250 states and 298 transitions. [2022-02-14 15:48:34,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-14 15:48:34,577 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.679245283018868) internal successors, (89), 52 states have internal predecessors, (89), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-02-14 15:48:34,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:34,578 INFO L225 Difference]: With dead ends: 250 [2022-02-14 15:48:34,578 INFO L226 Difference]: Without dead ends: 209 [2022-02-14 15:48:34,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1402, Invalid=6430, Unknown=0, NotChecked=0, Total=7832 [2022-02-14 15:48:34,579 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 69 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:34,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 87 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:48:34,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-02-14 15:48:34,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 121. [2022-02-14 15:48:34,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 96 states have internal predecessors, (109), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:48:34,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2022-02-14 15:48:34,711 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 97 [2022-02-14 15:48:34,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:34,712 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2022-02-14 15:48:34,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.679245283018868) internal successors, (89), 52 states have internal predecessors, (89), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:34,712 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2022-02-14 15:48:34,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-14 15:48:34,712 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:34,712 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:34,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-14 15:48:34,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:34,913 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:34,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1187918790, now seen corresponding path program 10 times [2022-02-14 15:48:34,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:34,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357385056] [2022-02-14 15:48:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:34,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:35,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:35,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:48:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:35,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 15:48:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:35,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 15:48:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:35,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-14 15:48:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:35,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-14 15:48:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:35,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-14 15:48:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:35,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-14 15:48:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:35,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-02-14 15:48:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:35,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 15:48:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:35,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-14 15:48:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 147 proven. 83 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:35,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:35,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357385056] [2022-02-14 15:48:35,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357385056] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:35,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924084308] [2022-02-14 15:48:35,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:48:35,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:35,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:35,160 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:35,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-14 15:48:35,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:48:35,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:48:35,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-14 15:48:35,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:35,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:36,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924084308] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:36,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:36,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-02-14 15:48:36,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081579347] [2022-02-14 15:48:36,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:36,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-14 15:48:36,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:36,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-14 15:48:36,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2022-02-14 15:48:36,012 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 53 states have internal predecessors, (90), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:36,914 INFO L93 Difference]: Finished difference Result 208 states and 244 transitions. [2022-02-14 15:48:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-14 15:48:36,915 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 53 states have internal predecessors, (90), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-02-14 15:48:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:36,915 INFO L225 Difference]: With dead ends: 208 [2022-02-14 15:48:36,915 INFO L226 Difference]: Without dead ends: 167 [2022-02-14 15:48:36,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1162, Invalid=5000, Unknown=0, NotChecked=0, Total=6162 [2022-02-14 15:48:36,916 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:36,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 97 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:48:36,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-02-14 15:48:37,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 123. [2022-02-14 15:48:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 98 states have internal predecessors, (111), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:48:37,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2022-02-14 15:48:37,061 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 97 [2022-02-14 15:48:37,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:37,062 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2022-02-14 15:48:37,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 53 states have internal predecessors, (90), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 15:48:37,062 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2022-02-14 15:48:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-14 15:48:37,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:37,062 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:37,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-02-14 15:48:37,270 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,SelfDestructingSolverStorable76 [2022-02-14 15:48:37,270 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:37,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:37,270 INFO L85 PathProgramCache]: Analyzing trace with hash -398793884, now seen corresponding path program 20 times [2022-02-14 15:48:37,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:37,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835253424] [2022-02-14 15:48:37,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:37,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:37,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:37,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:48:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:37,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:48:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:37,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 15:48:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:37,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-14 15:48:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:37,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-14 15:48:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:37,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-14 15:48:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:37,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-02-14 15:48:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:37,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-14 15:48:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:37,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-14 15:48:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:37,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-14 15:48:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 75 proven. 166 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:37,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:37,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835253424] [2022-02-14 15:48:37,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835253424] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:37,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715760723] [2022-02-14 15:48:37,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:48:37,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:37,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:37,404 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:37,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-14 15:48:37,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:48:37,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:48:37,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-14 15:48:37,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 86 proven. 155 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:37,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 86 proven. 155 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 15:48:37,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715760723] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:37,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:37,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 20 [2022-02-14 15:48:37,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024459701] [2022-02-14 15:48:37,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:37,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-14 15:48:37,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:37,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-14 15:48:37,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-02-14 15:48:37,741 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 15:48:38,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:38,232 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2022-02-14 15:48:38,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-14 15:48:38,233 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 98 [2022-02-14 15:48:38,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:38,233 INFO L225 Difference]: With dead ends: 136 [2022-02-14 15:48:38,233 INFO L226 Difference]: Without dead ends: 134 [2022-02-14 15:48:38,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2022-02-14 15:48:38,234 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 79 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:38,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 71 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:48:38,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-14 15:48:38,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2022-02-14 15:48:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 15:48:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2022-02-14 15:48:38,384 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 98 [2022-02-14 15:48:38,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:38,384 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2022-02-14 15:48:38,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 15:48:38,384 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2022-02-14 15:48:38,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-14 15:48:38,385 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:38,385 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:38,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-14 15:48:38,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-02-14 15:48:38,599 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:38,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:38,600 INFO L85 PathProgramCache]: Analyzing trace with hash -914733885, now seen corresponding path program 21 times [2022-02-14 15:48:38,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:38,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908096507] [2022-02-14 15:48:38,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:38,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:38,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:38,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:48:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:38,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:48:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:38,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 15:48:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:38,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-14 15:48:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:38,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-14 15:48:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:38,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-14 15:48:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:38,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-02-14 15:48:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:38,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-14 15:48:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:38,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-14 15:48:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:38,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-14 15:48:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:38,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-02-14 15:48:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 178 proven. 97 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:48:38,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:38,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908096507] [2022-02-14 15:48:38,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908096507] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:38,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911986132] [2022-02-14 15:48:38,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:48:38,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:38,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:38,868 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:38,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-14 15:48:38,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-02-14 15:48:38,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:48:38,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-14 15:48:38,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:39,476 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:48:39,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:48:39,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911986132] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:39,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:39,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 47 [2022-02-14 15:48:39,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279989405] [2022-02-14 15:48:39,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:39,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-14 15:48:39,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:39,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-14 15:48:39,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1738, Unknown=0, NotChecked=0, Total=2162 [2022-02-14 15:48:39,669 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 47 states, 47 states have (on average 1.8085106382978724) internal successors, (85), 46 states have internal predecessors, (85), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:48:41,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:41,833 INFO L93 Difference]: Finished difference Result 676 states and 858 transitions. [2022-02-14 15:48:41,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-14 15:48:41,834 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.8085106382978724) internal successors, (85), 46 states have internal predecessors, (85), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-02-14 15:48:41,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:41,836 INFO L225 Difference]: With dead ends: 676 [2022-02-14 15:48:41,836 INFO L226 Difference]: Without dead ends: 632 [2022-02-14 15:48:41,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2909 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1654, Invalid=7466, Unknown=0, NotChecked=0, Total=9120 [2022-02-14 15:48:41,836 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 235 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:41,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 110 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:48:41,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-02-14 15:48:41,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 131. [2022-02-14 15:48:41,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.145631067961165) internal successors, (118), 104 states have internal predecessors, (118), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 15:48:41,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2022-02-14 15:48:41,995 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 105 [2022-02-14 15:48:41,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:41,995 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2022-02-14 15:48:41,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.8085106382978724) internal successors, (85), 46 states have internal predecessors, (85), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:48:41,996 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2022-02-14 15:48:41,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-14 15:48:41,996 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:41,996 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:42,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-02-14 15:48:42,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:42,215 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:42,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:42,216 INFO L85 PathProgramCache]: Analyzing trace with hash 92507012, now seen corresponding path program 46 times [2022-02-14 15:48:42,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:42,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286237259] [2022-02-14 15:48:42,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:42,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:42,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:42,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:48:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:42,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:48:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:42,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 15:48:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:42,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-14 15:48:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:42,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-14 15:48:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:42,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-14 15:48:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:42,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-02-14 15:48:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:42,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-14 15:48:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:42,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-14 15:48:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:42,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-14 15:48:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:42,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-02-14 15:48:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 178 proven. 87 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:48:42,482 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:42,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286237259] [2022-02-14 15:48:42,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286237259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:42,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532609540] [2022-02-14 15:48:42,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:48:42,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:42,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:42,484 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:42,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-14 15:48:42,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:48:42,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:48:42,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-14 15:48:42,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:48:43,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:48:43,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532609540] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:43,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:43,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 48 [2022-02-14 15:48:43,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865354957] [2022-02-14 15:48:43,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:43,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-14 15:48:43,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:43,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-14 15:48:43,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1835, Unknown=0, NotChecked=0, Total=2256 [2022-02-14 15:48:43,282 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 48 states, 48 states have (on average 1.7916666666666667) internal successors, (86), 47 states have internal predecessors, (86), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:48:45,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:45,635 INFO L93 Difference]: Finished difference Result 640 states and 809 transitions. [2022-02-14 15:48:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-14 15:48:45,636 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.7916666666666667) internal successors, (86), 47 states have internal predecessors, (86), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-02-14 15:48:45,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:45,638 INFO L225 Difference]: With dead ends: 640 [2022-02-14 15:48:45,638 INFO L226 Difference]: Without dead ends: 596 [2022-02-14 15:48:45,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3669 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1927, Invalid=8993, Unknown=0, NotChecked=0, Total=10920 [2022-02-14 15:48:45,640 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 230 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:45,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 132 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:48:45,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-02-14 15:48:45,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 131. [2022-02-14 15:48:45,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.145631067961165) internal successors, (118), 104 states have internal predecessors, (118), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 15:48:45,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2022-02-14 15:48:45,858 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 105 [2022-02-14 15:48:45,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:45,858 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2022-02-14 15:48:45,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.7916666666666667) internal successors, (86), 47 states have internal predecessors, (86), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:48:45,858 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2022-02-14 15:48:45,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-14 15:48:45,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:45,859 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:45,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-14 15:48:46,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:46,082 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:46,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:46,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1252203747, now seen corresponding path program 47 times [2022-02-14 15:48:46,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:46,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379054746] [2022-02-14 15:48:46,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:46,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:46,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:46,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:48:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:46,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:48:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:46,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 15:48:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:46,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-14 15:48:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:46,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-14 15:48:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:46,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-14 15:48:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:46,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-02-14 15:48:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:46,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-14 15:48:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:46,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-14 15:48:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:46,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-14 15:48:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:46,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-02-14 15:48:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 178 proven. 79 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:48:46,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:46,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379054746] [2022-02-14 15:48:46,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379054746] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:46,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019458810] [2022-02-14 15:48:46,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:48:46,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:46,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:46,397 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:46,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-14 15:48:46,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-02-14 15:48:46,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:48:46,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-14 15:48:46,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:48:47,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:48:47,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019458810] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:47,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:47,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 49 [2022-02-14 15:48:47,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597878640] [2022-02-14 15:48:47,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:47,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-14 15:48:47,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:47,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-14 15:48:47,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1930, Unknown=0, NotChecked=0, Total=2352 [2022-02-14 15:48:47,256 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:48:49,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:49,593 INFO L93 Difference]: Finished difference Result 603 states and 759 transitions. [2022-02-14 15:48:49,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-14 15:48:49,593 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-02-14 15:48:49,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:49,596 INFO L225 Difference]: With dead ends: 603 [2022-02-14 15:48:49,596 INFO L226 Difference]: Without dead ends: 559 [2022-02-14 15:48:49,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4302 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2177, Invalid=10255, Unknown=0, NotChecked=0, Total=12432 [2022-02-14 15:48:49,597 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 233 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:49,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 103 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:48:49,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-02-14 15:48:49,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 131. [2022-02-14 15:48:49,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.145631067961165) internal successors, (118), 104 states have internal predecessors, (118), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 15:48:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2022-02-14 15:48:49,775 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 105 [2022-02-14 15:48:49,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:49,775 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2022-02-14 15:48:49,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:48:49,775 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2022-02-14 15:48:49,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-14 15:48:49,776 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:49,776 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:49,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-14 15:48:49,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:49,983 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:49,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:49,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1451903132, now seen corresponding path program 48 times [2022-02-14 15:48:49,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:49,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766386936] [2022-02-14 15:48:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:49,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:50,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:50,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:48:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:50,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:48:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:50,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 15:48:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:50,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-14 15:48:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:50,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-14 15:48:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:50,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-14 15:48:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:50,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-02-14 15:48:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:50,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-14 15:48:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:50,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-14 15:48:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:50,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-14 15:48:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:50,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-02-14 15:48:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 178 proven. 73 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:48:50,271 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:50,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766386936] [2022-02-14 15:48:50,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766386936] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:50,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370641885] [2022-02-14 15:48:50,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:48:50,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:50,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:50,276 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:50,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-14 15:48:50,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-02-14 15:48:50,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:48:50,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-14 15:48:50,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:48:50,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:48:51,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370641885] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:51,159 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:51,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 50 [2022-02-14 15:48:51,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536313857] [2022-02-14 15:48:51,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:51,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-14 15:48:51,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:51,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-14 15:48:51,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=2023, Unknown=0, NotChecked=0, Total=2450 [2022-02-14 15:48:51,160 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 50 states, 50 states have (on average 1.76) internal successors, (88), 49 states have internal predecessors, (88), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:48:53,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:53,625 INFO L93 Difference]: Finished difference Result 565 states and 708 transitions. [2022-02-14 15:48:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-14 15:48:53,626 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.76) internal successors, (88), 49 states have internal predecessors, (88), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-02-14 15:48:53,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:53,627 INFO L225 Difference]: With dead ends: 565 [2022-02-14 15:48:53,627 INFO L226 Difference]: Without dead ends: 521 [2022-02-14 15:48:53,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4737 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2370, Invalid=11202, Unknown=0, NotChecked=0, Total=13572 [2022-02-14 15:48:53,628 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 177 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:53,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 113 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:48:53,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-02-14 15:48:53,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 131. [2022-02-14 15:48:53,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.145631067961165) internal successors, (118), 104 states have internal predecessors, (118), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 15:48:53,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2022-02-14 15:48:53,789 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 105 [2022-02-14 15:48:53,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:53,789 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2022-02-14 15:48:53,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.76) internal successors, (88), 49 states have internal predecessors, (88), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:48:53,789 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2022-02-14 15:48:53,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-14 15:48:53,790 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:53,790 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:53,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-02-14 15:48:54,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:54,003 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:54,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:54,004 INFO L85 PathProgramCache]: Analyzing trace with hash 620129539, now seen corresponding path program 49 times [2022-02-14 15:48:54,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:54,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331891834] [2022-02-14 15:48:54,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:54,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:54,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:54,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:48:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:54,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:48:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:54,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 15:48:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:54,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-14 15:48:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:54,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-14 15:48:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:54,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-14 15:48:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:54,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-02-14 15:48:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:54,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-14 15:48:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:54,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-14 15:48:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:54,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-14 15:48:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:54,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-02-14 15:48:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 178 proven. 69 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:48:54,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:54,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331891834] [2022-02-14 15:48:54,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331891834] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:54,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968180599] [2022-02-14 15:48:54,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:48:54,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:54,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:54,280 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:54,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-14 15:48:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:54,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-14 15:48:54,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:48:54,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:48:55,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968180599] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:55,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:55,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 51 [2022-02-14 15:48:55,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621764457] [2022-02-14 15:48:55,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:55,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-14 15:48:55,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:55,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-14 15:48:55,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=2114, Unknown=0, NotChecked=0, Total=2550 [2022-02-14 15:48:55,146 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 51 states, 51 states have (on average 1.7450980392156863) internal successors, (89), 50 states have internal predecessors, (89), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:48:57,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:48:57,611 INFO L93 Difference]: Finished difference Result 526 states and 656 transitions. [2022-02-14 15:48:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-14 15:48:57,612 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7450980392156863) internal successors, (89), 50 states have internal predecessors, (89), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-02-14 15:48:57,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:48:57,614 INFO L225 Difference]: With dead ends: 526 [2022-02-14 15:48:57,614 INFO L226 Difference]: Without dead ends: 482 [2022-02-14 15:48:57,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4987 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2491, Invalid=11789, Unknown=0, NotChecked=0, Total=14280 [2022-02-14 15:48:57,615 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 151 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:48:57,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 123 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:48:57,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-02-14 15:48:57,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 131. [2022-02-14 15:48:57,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.145631067961165) internal successors, (118), 104 states have internal predecessors, (118), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 15:48:57,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2022-02-14 15:48:57,793 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 105 [2022-02-14 15:48:57,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:48:57,793 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2022-02-14 15:48:57,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7450980392156863) internal successors, (89), 50 states have internal predecessors, (89), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:48:57,793 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2022-02-14 15:48:57,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-14 15:48:57,794 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:48:57,794 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:48:57,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-02-14 15:48:57,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:58,000 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:48:58,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:48:58,000 INFO L85 PathProgramCache]: Analyzing trace with hash 428632900, now seen corresponding path program 50 times [2022-02-14 15:48:58,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:48:58,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473035768] [2022-02-14 15:48:58,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:48:58,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:48:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:58,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:48:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:58,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:48:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:58,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:48:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:58,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 15:48:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:58,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-14 15:48:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:58,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-14 15:48:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:58,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-14 15:48:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:58,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-02-14 15:48:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:58,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-14 15:48:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:58,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-14 15:48:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:58,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-14 15:48:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:58,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-02-14 15:48:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:48:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 178 proven. 67 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:48:58,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:48:58,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473035768] [2022-02-14 15:48:58,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473035768] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:48:58,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679708064] [2022-02-14 15:48:58,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:48:58,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:48:58,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:48:58,280 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:48:58,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-14 15:48:58,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:48:58,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:48:58,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-14 15:48:58,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:48:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:48:58,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:48:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:48:59,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679708064] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:48:59,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:48:59,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 52 [2022-02-14 15:48:59,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930701671] [2022-02-14 15:48:59,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:48:59,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-14 15:48:59,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:48:59,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-14 15:48:59,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=2203, Unknown=0, NotChecked=0, Total=2652 [2022-02-14 15:48:59,139 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 52 states, 52 states have (on average 1.7307692307692308) internal successors, (90), 51 states have internal predecessors, (90), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:49:01,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:49:01,532 INFO L93 Difference]: Finished difference Result 486 states and 603 transitions. [2022-02-14 15:49:01,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-14 15:49:01,532 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.7307692307692308) internal successors, (90), 51 states have internal predecessors, (90), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-02-14 15:49:01,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:49:01,534 INFO L225 Difference]: With dead ends: 486 [2022-02-14 15:49:01,534 INFO L226 Difference]: Without dead ends: 442 [2022-02-14 15:49:01,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5051 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2531, Invalid=11989, Unknown=0, NotChecked=0, Total=14520 [2022-02-14 15:49:01,535 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 155 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:49:01,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 109 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:49:01,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-02-14 15:49:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 131. [2022-02-14 15:49:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.145631067961165) internal successors, (118), 104 states have internal predecessors, (118), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 15:49:01,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2022-02-14 15:49:01,701 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 105 [2022-02-14 15:49:01,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:49:01,702 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2022-02-14 15:49:01,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.7307692307692308) internal successors, (90), 51 states have internal predecessors, (90), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:49:01,702 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2022-02-14 15:49:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-14 15:49:01,702 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:49:01,702 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:49:01,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-02-14 15:49:01,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-02-14 15:49:01,903 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:49:01,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:49:01,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1212795613, now seen corresponding path program 51 times [2022-02-14 15:49:01,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:49:01,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587383812] [2022-02-14 15:49:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:49:01,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:49:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:02,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:49:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:02,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:49:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:02,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:49:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:02,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 15:49:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:02,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-14 15:49:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:02,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-14 15:49:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:02,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-14 15:49:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:02,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-02-14 15:49:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:02,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-14 15:49:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:02,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-14 15:49:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:02,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-14 15:49:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:02,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-02-14 15:49:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 178 proven. 67 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:02,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:49:02,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587383812] [2022-02-14 15:49:02,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587383812] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:49:02,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278990704] [2022-02-14 15:49:02,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:49:02,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:02,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:49:02,171 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:49:02,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-14 15:49:02,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-02-14 15:49:02,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:49:02,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-14 15:49:02,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:49:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:02,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:49:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:03,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278990704] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:49:03,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:49:03,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 53 [2022-02-14 15:49:03,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203175540] [2022-02-14 15:49:03,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:49:03,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-14 15:49:03,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:49:03,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-14 15:49:03,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=2290, Unknown=0, NotChecked=0, Total=2756 [2022-02-14 15:49:03,071 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 53 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 52 states have internal predecessors, (91), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:49:05,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:49:05,314 INFO L93 Difference]: Finished difference Result 445 states and 549 transitions. [2022-02-14 15:49:05,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-14 15:49:05,314 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 52 states have internal predecessors, (91), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-02-14 15:49:05,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:49:05,316 INFO L225 Difference]: With dead ends: 445 [2022-02-14 15:49:05,316 INFO L226 Difference]: Without dead ends: 401 [2022-02-14 15:49:05,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4935 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2487, Invalid=11793, Unknown=0, NotChecked=0, Total=14280 [2022-02-14 15:49:05,317 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 147 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:49:05,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 100 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:49:05,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-02-14 15:49:05,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 131. [2022-02-14 15:49:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.145631067961165) internal successors, (118), 104 states have internal predecessors, (118), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 15:49:05,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2022-02-14 15:49:05,550 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 105 [2022-02-14 15:49:05,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:49:05,550 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2022-02-14 15:49:05,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 52 states have internal predecessors, (91), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:49:05,550 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2022-02-14 15:49:05,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-14 15:49:05,551 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:49:05,551 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:49:05,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-02-14 15:49:05,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:05,751 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:49:05,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:49:05,752 INFO L85 PathProgramCache]: Analyzing trace with hash -557471964, now seen corresponding path program 52 times [2022-02-14 15:49:05,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:49:05,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694973395] [2022-02-14 15:49:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:49:05,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:49:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:05,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:49:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:05,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:49:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:05,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:49:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:06,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 15:49:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:06,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-14 15:49:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:06,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-14 15:49:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:06,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-14 15:49:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:06,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-02-14 15:49:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:06,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-14 15:49:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:06,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-14 15:49:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:06,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-14 15:49:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:06,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-02-14 15:49:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 178 proven. 69 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:06,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:49:06,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694973395] [2022-02-14 15:49:06,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694973395] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:49:06,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503162705] [2022-02-14 15:49:06,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:49:06,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:06,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:49:06,023 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:49:06,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-14 15:49:06,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:49:06,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:49:06,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-14 15:49:06,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:49:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:06,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:49:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:06,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503162705] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:49:06,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:49:06,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 54 [2022-02-14 15:49:06,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922590150] [2022-02-14 15:49:06,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:49:06,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-14 15:49:06,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:49:06,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-14 15:49:06,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=2375, Unknown=0, NotChecked=0, Total=2862 [2022-02-14 15:49:06,911 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 54 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 53 states have internal predecessors, (92), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:49:09,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:49:09,051 INFO L93 Difference]: Finished difference Result 403 states and 494 transitions. [2022-02-14 15:49:09,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-14 15:49:09,051 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 53 states have internal predecessors, (92), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-02-14 15:49:09,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:49:09,052 INFO L225 Difference]: With dead ends: 403 [2022-02-14 15:49:09,052 INFO L226 Difference]: Without dead ends: 359 [2022-02-14 15:49:09,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 209 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4647 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2362, Invalid=11210, Unknown=0, NotChecked=0, Total=13572 [2022-02-14 15:49:09,054 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 115 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:49:09,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 118 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:49:09,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-02-14 15:49:09,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 131. [2022-02-14 15:49:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.145631067961165) internal successors, (118), 104 states have internal predecessors, (118), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 15:49:09,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2022-02-14 15:49:09,248 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 105 [2022-02-14 15:49:09,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:49:09,248 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2022-02-14 15:49:09,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 53 states have internal predecessors, (92), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:49:09,249 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2022-02-14 15:49:09,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-14 15:49:09,249 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:49:09,249 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:49:09,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-02-14 15:49:09,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:09,453 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:49:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:49:09,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1717275325, now seen corresponding path program 53 times [2022-02-14 15:49:09,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:49:09,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679560328] [2022-02-14 15:49:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:49:09,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:49:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:09,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:49:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:09,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:49:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:09,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:49:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:09,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 15:49:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:09,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-14 15:49:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:09,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-14 15:49:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:09,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-14 15:49:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:09,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-02-14 15:49:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:09,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-14 15:49:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:09,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-14 15:49:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:09,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-14 15:49:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:09,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-02-14 15:49:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 178 proven. 73 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:09,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:49:09,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679560328] [2022-02-14 15:49:09,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679560328] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:49:09,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376313135] [2022-02-14 15:49:09,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:49:09,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:09,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:49:09,716 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:49:09,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-14 15:49:09,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-02-14 15:49:09,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:49:09,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-14 15:49:09,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:49:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:10,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:49:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:10,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376313135] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:49:10,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:49:10,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 55 [2022-02-14 15:49:10,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604603597] [2022-02-14 15:49:10,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:49:10,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-14 15:49:10,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:49:10,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-14 15:49:10,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=2458, Unknown=0, NotChecked=0, Total=2970 [2022-02-14 15:49:10,621 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 55 states, 55 states have (on average 1.690909090909091) internal successors, (93), 54 states have internal predecessors, (93), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:49:12,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:49:12,589 INFO L93 Difference]: Finished difference Result 360 states and 438 transitions. [2022-02-14 15:49:12,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-14 15:49:12,591 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.690909090909091) internal successors, (93), 54 states have internal predecessors, (93), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-02-14 15:49:12,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:49:12,592 INFO L225 Difference]: With dead ends: 360 [2022-02-14 15:49:12,592 INFO L226 Difference]: Without dead ends: 316 [2022-02-14 15:49:12,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4206 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2165, Invalid=10267, Unknown=0, NotChecked=0, Total=12432 [2022-02-14 15:49:12,594 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 95 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:49:12,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 103 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:49:12,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-14 15:49:12,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 131. [2022-02-14 15:49:12,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.145631067961165) internal successors, (118), 104 states have internal predecessors, (118), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 15:49:12,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2022-02-14 15:49:12,825 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 105 [2022-02-14 15:49:12,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:49:12,825 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2022-02-14 15:49:12,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.690909090909091) internal successors, (93), 54 states have internal predecessors, (93), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:49:12,826 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2022-02-14 15:49:12,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-14 15:49:12,826 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:49:12,826 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:49:12,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-02-14 15:49:13,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:13,040 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:49:13,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:49:13,040 INFO L85 PathProgramCache]: Analyzing trace with hash 983526148, now seen corresponding path program 54 times [2022-02-14 15:49:13,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:49:13,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236427166] [2022-02-14 15:49:13,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:49:13,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:49:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:13,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:49:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:13,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:49:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:13,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:49:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:13,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 15:49:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:13,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-14 15:49:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:13,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-14 15:49:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:13,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-14 15:49:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:13,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-02-14 15:49:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:13,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-14 15:49:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:13,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-14 15:49:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:13,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-14 15:49:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:13,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-02-14 15:49:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 178 proven. 79 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:13,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:49:13,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236427166] [2022-02-14 15:49:13,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236427166] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:49:13,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482410218] [2022-02-14 15:49:13,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:49:13,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:13,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:49:13,368 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:49:13,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-14 15:49:13,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-02-14 15:49:13,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:49:13,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-14 15:49:13,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:49:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:14,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:49:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:14,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482410218] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:49:14,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:49:14,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 56 [2022-02-14 15:49:14,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874244243] [2022-02-14 15:49:14,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:49:14,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-14 15:49:14,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:49:14,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-14 15:49:14,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2539, Unknown=0, NotChecked=0, Total=3080 [2022-02-14 15:49:14,408 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 56 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 55 states have internal predecessors, (94), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:49:16,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:49:16,045 INFO L93 Difference]: Finished difference Result 316 states and 381 transitions. [2022-02-14 15:49:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-14 15:49:16,045 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 55 states have internal predecessors, (94), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-02-14 15:49:16,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:49:16,046 INFO L225 Difference]: With dead ends: 316 [2022-02-14 15:49:16,046 INFO L226 Difference]: Without dead ends: 272 [2022-02-14 15:49:16,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3643 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1911, Invalid=9009, Unknown=0, NotChecked=0, Total=10920 [2022-02-14 15:49:16,047 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 83 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:49:16,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 101 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:49:16,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-14 15:49:16,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 131. [2022-02-14 15:49:16,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.145631067961165) internal successors, (118), 104 states have internal predecessors, (118), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 15:49:16,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2022-02-14 15:49:16,225 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 105 [2022-02-14 15:49:16,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:49:16,226 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2022-02-14 15:49:16,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 55 states have internal predecessors, (94), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:49:16,226 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2022-02-14 15:49:16,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-14 15:49:16,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:49:16,226 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:49:16,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-02-14 15:49:16,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:16,428 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:49:16,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:49:16,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1190974109, now seen corresponding path program 55 times [2022-02-14 15:49:16,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:49:16,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977196593] [2022-02-14 15:49:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:49:16,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:49:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:16,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:49:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:16,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:49:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:16,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:49:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:16,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 15:49:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:16,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-14 15:49:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:16,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-14 15:49:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:16,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-14 15:49:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:16,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-02-14 15:49:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:16,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-14 15:49:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:16,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-14 15:49:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:16,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-14 15:49:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:16,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-02-14 15:49:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 178 proven. 87 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:16,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:49:16,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977196593] [2022-02-14 15:49:16,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977196593] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:49:16,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613998962] [2022-02-14 15:49:16,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:49:16,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:16,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:49:16,728 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:49:16,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-14 15:49:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:16,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-14 15:49:16,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:49:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:17,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:49:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:17,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613998962] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:49:17,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:49:17,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 57 [2022-02-14 15:49:17,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99198000] [2022-02-14 15:49:17,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:49:17,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-14 15:49:17,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:49:17,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-14 15:49:17,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=2618, Unknown=0, NotChecked=0, Total=3192 [2022-02-14 15:49:17,644 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 states have internal predecessors, (95), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:49:19,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:49:19,058 INFO L93 Difference]: Finished difference Result 271 states and 323 transitions. [2022-02-14 15:49:19,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-14 15:49:19,058 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 states have internal predecessors, (95), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-02-14 15:49:19,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:49:19,059 INFO L225 Difference]: With dead ends: 271 [2022-02-14 15:49:19,059 INFO L226 Difference]: Without dead ends: 227 [2022-02-14 15:49:19,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2988 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1621, Invalid=7499, Unknown=0, NotChecked=0, Total=9120 [2022-02-14 15:49:19,060 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 71 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:49:19,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 83 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:49:19,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-02-14 15:49:19,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 131. [2022-02-14 15:49:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.145631067961165) internal successors, (118), 104 states have internal predecessors, (118), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 15:49:19,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2022-02-14 15:49:19,291 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 105 [2022-02-14 15:49:19,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:49:19,291 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2022-02-14 15:49:19,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 states have internal predecessors, (95), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:49:19,291 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2022-02-14 15:49:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-14 15:49:19,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:49:19,292 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:49:19,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-02-14 15:49:19,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:19,493 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:49:19,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:49:19,493 INFO L85 PathProgramCache]: Analyzing trace with hash 118994660, now seen corresponding path program 11 times [2022-02-14 15:49:19,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:49:19,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668878592] [2022-02-14 15:49:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:49:19,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:49:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:19,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:49:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:19,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 15:49:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:19,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:49:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:19,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 15:49:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:19,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-14 15:49:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:19,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-14 15:49:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:19,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-14 15:49:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:19,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-02-14 15:49:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:19,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-14 15:49:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:19,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-14 15:49:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:19,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-14 15:49:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:19,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-02-14 15:49:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 178 proven. 97 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:19,759 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:49:19,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668878592] [2022-02-14 15:49:19,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668878592] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:49:19,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982294627] [2022-02-14 15:49:19,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:49:19,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:19,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:49:19,761 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:49:19,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-14 15:49:19,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-02-14 15:49:19,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:49:19,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-14 15:49:19,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:49:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:20,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:49:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:20,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982294627] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:49:20,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:49:20,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-02-14 15:49:20,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33406441] [2022-02-14 15:49:20,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:49:20,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-14 15:49:20,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:49:20,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-14 15:49:20,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2695, Unknown=0, NotChecked=0, Total=3306 [2022-02-14 15:49:20,700 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 58 states, 58 states have (on average 1.6551724137931034) internal successors, (96), 57 states have internal predecessors, (96), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:49:21,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:49:21,775 INFO L93 Difference]: Finished difference Result 225 states and 264 transitions. [2022-02-14 15:49:21,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-14 15:49:21,775 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.6551724137931034) internal successors, (96), 57 states have internal predecessors, (96), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-02-14 15:49:21,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:49:21,776 INFO L225 Difference]: With dead ends: 225 [2022-02-14 15:49:21,776 INFO L226 Difference]: Without dead ends: 181 [2022-02-14 15:49:21,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2310 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1335, Invalid=5805, Unknown=0, NotChecked=0, Total=7140 [2022-02-14 15:49:21,777 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:49:21,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 108 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:49:21,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-02-14 15:49:21,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 133. [2022-02-14 15:49:21,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 106 states have internal predecessors, (120), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 15:49:21,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2022-02-14 15:49:21,978 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 105 [2022-02-14 15:49:21,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:49:21,978 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2022-02-14 15:49:21,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.6551724137931034) internal successors, (96), 57 states have internal predecessors, (96), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 15:49:21,979 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2022-02-14 15:49:21,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-02-14 15:49:21,979 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:49:21,979 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:49:21,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-02-14 15:49:22,179 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,SelfDestructingSolverStorable89 [2022-02-14 15:49:22,180 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:49:22,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:49:22,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1969708607, now seen corresponding path program 22 times [2022-02-14 15:49:22,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:49:22,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762733597] [2022-02-14 15:49:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:49:22,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:49:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:22,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:49:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:22,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:49:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:22,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:49:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:22,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:49:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:22,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:49:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:22,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 15:49:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:22,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-14 15:49:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:22,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-02-14 15:49:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:22,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-14 15:49:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:22,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-14 15:49:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:22,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-14 15:49:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:22,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-14 15:49:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 88 proven. 199 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:22,320 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:49:22,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762733597] [2022-02-14 15:49:22,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762733597] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:49:22,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310430352] [2022-02-14 15:49:22,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:49:22,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:22,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:49:22,322 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:49:22,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-14 15:49:22,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:49:22,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:49:22,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-14 15:49:22,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:49:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 100 proven. 187 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:22,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:49:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 100 proven. 187 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 15:49:22,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310430352] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:49:22,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:49:22,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 21 [2022-02-14 15:49:22,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715516213] [2022-02-14 15:49:22,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:49:22,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-14 15:49:22,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:49:22,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-14 15:49:22,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-02-14 15:49:22,679 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 13 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:49:23,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:49:23,198 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2022-02-14 15:49:23,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-14 15:49:23,198 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 13 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 106 [2022-02-14 15:49:23,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:49:23,199 INFO L225 Difference]: With dead ends: 146 [2022-02-14 15:49:23,199 INFO L226 Difference]: Without dead ends: 144 [2022-02-14 15:49:23,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=352, Invalid=1054, Unknown=0, NotChecked=0, Total=1406 [2022-02-14 15:49:23,199 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 98 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:49:23,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 68 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:49:23,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-14 15:49:23,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2022-02-14 15:49:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:49:23,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2022-02-14 15:49:23,403 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 106 [2022-02-14 15:49:23,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:49:23,403 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2022-02-14 15:49:23,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 13 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 15:49:23,403 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2022-02-14 15:49:23,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-14 15:49:23,404 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:49:23,404 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:49:23,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-02-14 15:49:23,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:23,615 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:49:23,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:49:23,616 INFO L85 PathProgramCache]: Analyzing trace with hash 278401990, now seen corresponding path program 23 times [2022-02-14 15:49:23,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:49:23,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998494230] [2022-02-14 15:49:23,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:49:23,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:49:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:23,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:49:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:23,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:49:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:23,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:49:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:23,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:49:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:23,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:49:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:23,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 15:49:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:23,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-14 15:49:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:23,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-02-14 15:49:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:23,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-14 15:49:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:23,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-14 15:49:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:23,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-14 15:49:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:23,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-14 15:49:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:23,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-02-14 15:49:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 212 proven. 112 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:23,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:49:23,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998494230] [2022-02-14 15:49:23,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998494230] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:49:23,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207657393] [2022-02-14 15:49:23,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:49:23,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:23,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:49:23,915 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:49:23,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-14 15:49:23,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-02-14 15:49:23,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:49:23,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 15:49:23,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:49:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:24,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:49:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:24,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207657393] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:49:24,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:49:24,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 50 [2022-02-14 15:49:24,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479890445] [2022-02-14 15:49:24,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:49:24,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-14 15:49:24,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:49:24,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-14 15:49:24,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1967, Unknown=0, NotChecked=0, Total=2450 [2022-02-14 15:49:24,779 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 50 states, 50 states have (on average 1.8) internal successors, (90), 49 states have internal predecessors, (90), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:49:27,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:49:27,719 INFO L93 Difference]: Finished difference Result 776 states and 986 transitions. [2022-02-14 15:49:27,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-14 15:49:27,719 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.8) internal successors, (90), 49 states have internal predecessors, (90), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-02-14 15:49:27,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:49:27,721 INFO L225 Difference]: With dead ends: 776 [2022-02-14 15:49:27,721 INFO L226 Difference]: Without dead ends: 729 [2022-02-14 15:49:27,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 233 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3392 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1892, Invalid=8614, Unknown=0, NotChecked=0, Total=10506 [2022-02-14 15:49:27,722 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 263 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:49:27,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 135 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:49:27,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-02-14 15:49:27,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 141. [2022-02-14 15:49:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 112 states have internal predecessors, (127), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:49:27,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2022-02-14 15:49:27,948 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 113 [2022-02-14 15:49:27,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:49:27,948 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2022-02-14 15:49:27,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.8) internal successors, (90), 49 states have internal predecessors, (90), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:49:27,948 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2022-02-14 15:49:27,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-14 15:49:27,948 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:49:27,948 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:49:27,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-02-14 15:49:28,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:28,149 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:49:28,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:49:28,149 INFO L85 PathProgramCache]: Analyzing trace with hash -881401371, now seen corresponding path program 56 times [2022-02-14 15:49:28,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:49:28,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122157076] [2022-02-14 15:49:28,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:49:28,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:49:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:28,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:49:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:28,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:49:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:28,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:49:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:28,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:49:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:28,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:49:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:28,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 15:49:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:28,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-14 15:49:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:28,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-02-14 15:49:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:28,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-14 15:49:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:28,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-14 15:49:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:28,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-14 15:49:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:28,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-14 15:49:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:28,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-02-14 15:49:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 212 proven. 101 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:28,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:49:28,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122157076] [2022-02-14 15:49:28,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122157076] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:49:28,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871433241] [2022-02-14 15:49:28,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:49:28,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:28,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:49:28,456 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:49:28,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-14 15:49:28,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:49:28,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:49:28,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 15:49:28,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:49:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:29,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:49:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:29,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871433241] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:49:29,326 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:49:29,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 51 [2022-02-14 15:49:29,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193733398] [2022-02-14 15:49:29,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:49:29,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-14 15:49:29,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:49:29,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-14 15:49:29,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=2071, Unknown=0, NotChecked=0, Total=2550 [2022-02-14 15:49:29,327 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 51 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 50 states have internal predecessors, (91), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:49:32,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:49:32,387 INFO L93 Difference]: Finished difference Result 737 states and 933 transitions. [2022-02-14 15:49:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-14 15:49:32,387 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 50 states have internal predecessors, (91), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-02-14 15:49:32,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:49:32,389 INFO L225 Difference]: With dead ends: 737 [2022-02-14 15:49:32,389 INFO L226 Difference]: Without dead ends: 690 [2022-02-14 15:49:32,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4311 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2221, Invalid=10435, Unknown=0, NotChecked=0, Total=12656 [2022-02-14 15:49:32,390 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 247 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:49:32,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 125 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1454 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:49:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-02-14 15:49:32,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 141. [2022-02-14 15:49:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 112 states have internal predecessors, (127), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:49:32,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2022-02-14 15:49:32,614 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 113 [2022-02-14 15:49:32,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:49:32,614 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2022-02-14 15:49:32,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 50 states have internal predecessors, (91), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:49:32,614 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2022-02-14 15:49:32,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-14 15:49:32,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:49:32,614 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:49:32,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-02-14 15:49:32,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:32,815 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:49:32,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:49:32,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1819400102, now seen corresponding path program 57 times [2022-02-14 15:49:32,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:49:32,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758857909] [2022-02-14 15:49:32,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:49:32,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:49:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:33,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:49:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:33,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:49:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:33,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:49:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:33,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:49:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:33,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:49:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:33,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 15:49:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:33,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-14 15:49:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:33,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-02-14 15:49:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:33,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-14 15:49:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:33,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-14 15:49:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:33,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-14 15:49:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:33,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-14 15:49:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:33,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-02-14 15:49:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 212 proven. 92 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:33,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:49:33,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758857909] [2022-02-14 15:49:33,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758857909] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:49:33,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945817962] [2022-02-14 15:49:33,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:49:33,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:33,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:49:33,109 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:49:33,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-14 15:49:33,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-02-14 15:49:33,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:49:33,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 15:49:33,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:49:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:33,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:49:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:33,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945817962] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:49:33,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:49:33,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 52 [2022-02-14 15:49:33,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763499703] [2022-02-14 15:49:33,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:49:33,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-14 15:49:33,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:49:33,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-14 15:49:33,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=2173, Unknown=0, NotChecked=0, Total=2652 [2022-02-14 15:49:33,999 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 52 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 51 states have internal predecessors, (92), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:49:37,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:49:37,107 INFO L93 Difference]: Finished difference Result 697 states and 879 transitions. [2022-02-14 15:49:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-14 15:49:37,107 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 51 states have internal predecessors, (92), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-02-14 15:49:37,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:49:37,110 INFO L225 Difference]: With dead ends: 697 [2022-02-14 15:49:37,110 INFO L226 Difference]: Without dead ends: 650 [2022-02-14 15:49:37,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2531, Invalid=11989, Unknown=0, NotChecked=0, Total=14520 [2022-02-14 15:49:37,111 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 205 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:49:37,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 121 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:49:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-02-14 15:49:37,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 141. [2022-02-14 15:49:37,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 112 states have internal predecessors, (127), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:49:37,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2022-02-14 15:49:37,407 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 113 [2022-02-14 15:49:37,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:49:37,407 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2022-02-14 15:49:37,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 51 states have internal predecessors, (92), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:49:37,408 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2022-02-14 15:49:37,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-14 15:49:37,408 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:49:37,408 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:49:37,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-02-14 15:49:37,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:37,623 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:49:37,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:49:37,624 INFO L85 PathProgramCache]: Analyzing trace with hash -355100155, now seen corresponding path program 58 times [2022-02-14 15:49:37,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:49:37,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902349829] [2022-02-14 15:49:37,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:49:37,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:49:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:37,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:49:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:37,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:49:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:37,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:49:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:37,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:49:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:37,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:49:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:37,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 15:49:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:37,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-14 15:49:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:37,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-02-14 15:49:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:37,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-14 15:49:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:37,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-14 15:49:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:37,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-14 15:49:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:37,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-14 15:49:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:37,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-02-14 15:49:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 212 proven. 85 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:37,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:49:37,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902349829] [2022-02-14 15:49:37,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902349829] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:49:37,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123237862] [2022-02-14 15:49:37,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:49:37,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:37,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:49:37,972 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:49:37,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-14 15:49:38,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:49:38,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:49:38,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 15:49:38,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:49:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:38,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:49:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:38,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123237862] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:49:38,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:49:38,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 53 [2022-02-14 15:49:38,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442045152] [2022-02-14 15:49:38,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:49:38,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-14 15:49:38,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:49:38,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-14 15:49:38,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2273, Unknown=0, NotChecked=0, Total=2756 [2022-02-14 15:49:38,962 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 53 states, 53 states have (on average 1.7547169811320755) internal successors, (93), 52 states have internal predecessors, (93), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:49:42,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:49:42,170 INFO L93 Difference]: Finished difference Result 656 states and 824 transitions. [2022-02-14 15:49:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-14 15:49:42,170 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7547169811320755) internal successors, (93), 52 states have internal predecessors, (93), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-02-14 15:49:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:49:42,172 INFO L225 Difference]: With dead ends: 656 [2022-02-14 15:49:42,172 INFO L226 Difference]: Without dead ends: 609 [2022-02-14 15:49:42,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5679 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2784, Invalid=13218, Unknown=0, NotChecked=0, Total=16002 [2022-02-14 15:49:42,173 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 206 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:49:42,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 125 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:49:42,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-02-14 15:49:42,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 141. [2022-02-14 15:49:42,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 112 states have internal predecessors, (127), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:49:42,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2022-02-14 15:49:42,396 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 113 [2022-02-14 15:49:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:49:42,396 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2022-02-14 15:49:42,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7547169811320755) internal successors, (93), 52 states have internal predecessors, (93), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:49:42,396 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2022-02-14 15:49:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-14 15:49:42,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:49:42,397 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:49:42,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-02-14 15:49:42,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:42,611 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:49:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:49:42,612 INFO L85 PathProgramCache]: Analyzing trace with hash 954868614, now seen corresponding path program 59 times [2022-02-14 15:49:42,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:49:42,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700702198] [2022-02-14 15:49:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:49:42,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:49:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:42,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:49:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:42,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:49:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:42,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:49:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:42,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:49:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:42,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:49:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:42,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 15:49:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:42,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-14 15:49:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:42,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-02-14 15:49:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:42,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-14 15:49:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:42,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-14 15:49:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:42,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-14 15:49:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:42,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-14 15:49:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:42,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-02-14 15:49:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 212 proven. 80 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:42,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:49:42,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700702198] [2022-02-14 15:49:42,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700702198] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:49:42,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294525552] [2022-02-14 15:49:42,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:49:42,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:42,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:49:42,896 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:49:42,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-14 15:49:42,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-02-14 15:49:42,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:49:42,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 15:49:42,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:49:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:43,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:49:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:43,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294525552] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:49:43,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:49:43,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 54 [2022-02-14 15:49:43,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421140254] [2022-02-14 15:49:43,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:49:43,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-14 15:49:43,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:49:43,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-14 15:49:43,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=2371, Unknown=0, NotChecked=0, Total=2862 [2022-02-14 15:49:43,832 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 54 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 53 states have internal predecessors, (94), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:49:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:49:47,004 INFO L93 Difference]: Finished difference Result 614 states and 768 transitions. [2022-02-14 15:49:47,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-14 15:49:47,005 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 53 states have internal predecessors, (94), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-02-14 15:49:47,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:49:47,007 INFO L225 Difference]: With dead ends: 614 [2022-02-14 15:49:47,007 INFO L226 Difference]: Without dead ends: 567 [2022-02-14 15:49:47,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6057 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2962, Invalid=14068, Unknown=0, NotChecked=0, Total=17030 [2022-02-14 15:49:47,008 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 174 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:49:47,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 114 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:49:47,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-02-14 15:49:47,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 141. [2022-02-14 15:49:47,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 112 states have internal predecessors, (127), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:49:47,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2022-02-14 15:49:47,245 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 113 [2022-02-14 15:49:47,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:49:47,245 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2022-02-14 15:49:47,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 53 states have internal predecessors, (94), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:49:47,246 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2022-02-14 15:49:47,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-14 15:49:47,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:49:47,246 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:49:47,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-02-14 15:49:47,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-02-14 15:49:47,447 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:49:47,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:49:47,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1385772507, now seen corresponding path program 60 times [2022-02-14 15:49:47,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:49:47,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749004662] [2022-02-14 15:49:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:49:47,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:49:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:47,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:49:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:47,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:49:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:47,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:49:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:47,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:49:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:47,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:49:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:47,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 15:49:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:47,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-14 15:49:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:47,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-02-14 15:49:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:47,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-14 15:49:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:47,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-14 15:49:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:47,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-14 15:49:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:47,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-14 15:49:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:47,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-02-14 15:49:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 212 proven. 77 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:47,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:49:47,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749004662] [2022-02-14 15:49:47,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749004662] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:49:47,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889440613] [2022-02-14 15:49:47,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:49:47,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:47,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:49:47,754 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:49:47,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-14 15:49:47,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-02-14 15:49:47,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:49:47,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 15:49:47,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:49:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:48,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:49:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:48,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889440613] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:49:48,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:49:48,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 55 [2022-02-14 15:49:48,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953147144] [2022-02-14 15:49:48,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:49:48,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-14 15:49:48,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:49:48,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-14 15:49:48,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=2467, Unknown=0, NotChecked=0, Total=2970 [2022-02-14 15:49:48,813 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 55 states, 55 states have (on average 1.7272727272727273) internal successors, (95), 54 states have internal predecessors, (95), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:49:51,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:49:51,915 INFO L93 Difference]: Finished difference Result 571 states and 711 transitions. [2022-02-14 15:49:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-14 15:49:51,916 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7272727272727273) internal successors, (95), 54 states have internal predecessors, (95), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-02-14 15:49:51,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:49:51,917 INFO L225 Difference]: With dead ends: 571 [2022-02-14 15:49:51,917 INFO L226 Difference]: Without dead ends: 524 [2022-02-14 15:49:51,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6227 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3053, Invalid=14503, Unknown=0, NotChecked=0, Total=17556 [2022-02-14 15:49:51,919 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 156 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:49:51,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 114 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:49:51,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-02-14 15:49:52,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 141. [2022-02-14 15:49:52,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 112 states have internal predecessors, (127), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:49:52,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2022-02-14 15:49:52,152 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 113 [2022-02-14 15:49:52,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:49:52,152 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2022-02-14 15:49:52,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7272727272727273) internal successors, (95), 54 states have internal predecessors, (95), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:49:52,152 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2022-02-14 15:49:52,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-14 15:49:52,152 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:49:52,153 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:49:52,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-02-14 15:49:52,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-02-14 15:49:52,353 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:49:52,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:49:52,353 INFO L85 PathProgramCache]: Analyzing trace with hash -931203226, now seen corresponding path program 61 times [2022-02-14 15:49:52,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:49:52,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761155457] [2022-02-14 15:49:52,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:49:52,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:49:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:52,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:49:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:52,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:49:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:52,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:49:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:52,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:49:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:52,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:49:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:52,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 15:49:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:52,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-14 15:49:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:52,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-02-14 15:49:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:52,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-14 15:49:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:52,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-14 15:49:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:52,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-14 15:49:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:52,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-14 15:49:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:52,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-02-14 15:49:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 212 proven. 76 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:52,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:49:52,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761155457] [2022-02-14 15:49:52,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761155457] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:49:52,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699830855] [2022-02-14 15:49:52,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:49:52,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:52,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:49:52,717 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:49:52,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-14 15:49:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:52,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 15:49:52,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:49:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 246 proven. 42 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:53,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:49:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 246 proven. 42 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:53,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699830855] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:49:53,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:49:53,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 56 [2022-02-14 15:49:53,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401294723] [2022-02-14 15:49:53,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:49:53,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-14 15:49:53,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:49:53,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-14 15:49:53,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=2561, Unknown=0, NotChecked=0, Total=3080 [2022-02-14 15:49:53,652 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 56 states, 56 states have (on average 1.7142857142857142) internal successors, (96), 55 states have internal predecessors, (96), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:49:56,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:49:56,687 INFO L93 Difference]: Finished difference Result 527 states and 653 transitions. [2022-02-14 15:49:56,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-14 15:49:56,687 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.7142857142857142) internal successors, (96), 55 states have internal predecessors, (96), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-02-14 15:49:56,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:49:56,689 INFO L225 Difference]: With dead ends: 527 [2022-02-14 15:49:56,689 INFO L226 Difference]: Without dead ends: 480 [2022-02-14 15:49:56,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6193 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3051, Invalid=14505, Unknown=0, NotChecked=0, Total=17556 [2022-02-14 15:49:56,690 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 135 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:49:56,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 121 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1338 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:49:56,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-02-14 15:49:56,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 141. [2022-02-14 15:49:56,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 112 states have internal predecessors, (127), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:49:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2022-02-14 15:49:56,922 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 113 [2022-02-14 15:49:56,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:49:56,922 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2022-02-14 15:49:56,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.7142857142857142) internal successors, (96), 55 states have internal predecessors, (96), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:49:56,922 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2022-02-14 15:49:56,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-14 15:49:56,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:49:56,923 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:49:56,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-02-14 15:49:57,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:57,124 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:49:57,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:49:57,125 INFO L85 PathProgramCache]: Analyzing trace with hash 275542597, now seen corresponding path program 62 times [2022-02-14 15:49:57,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:49:57,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147796283] [2022-02-14 15:49:57,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:49:57,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:49:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:57,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:49:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:57,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:49:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:57,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:49:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:57,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:49:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:57,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:49:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:57,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 15:49:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:57,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-14 15:49:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:57,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-02-14 15:49:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:57,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-14 15:49:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:57,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-14 15:49:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:57,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-14 15:49:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:57,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-14 15:49:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:57,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-02-14 15:49:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:49:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 212 proven. 77 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:57,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:49:57,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147796283] [2022-02-14 15:49:57,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147796283] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:49:57,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373109975] [2022-02-14 15:49:57,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:49:57,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:49:57,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:49:57,411 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:49:57,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-14 15:49:57,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:49:57,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:49:57,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 15:49:57,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:49:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:58,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:49:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:49:58,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373109975] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:49:58,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:49:58,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 57 [2022-02-14 15:49:58,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515484413] [2022-02-14 15:49:58,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:49:58,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-14 15:49:58,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:49:58,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-14 15:49:58,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2653, Unknown=0, NotChecked=0, Total=3192 [2022-02-14 15:49:58,360 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 57 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 56 states have internal predecessors, (97), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:50:01,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:50:01,210 INFO L93 Difference]: Finished difference Result 482 states and 594 transitions. [2022-02-14 15:50:01,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-14 15:50:01,210 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 56 states have internal predecessors, (97), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-02-14 15:50:01,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:50:01,212 INFO L225 Difference]: With dead ends: 482 [2022-02-14 15:50:01,212 INFO L226 Difference]: Without dead ends: 435 [2022-02-14 15:50:01,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5961 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2956, Invalid=14074, Unknown=0, NotChecked=0, Total=17030 [2022-02-14 15:50:01,213 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 128 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:50:01,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 107 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:50:01,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-02-14 15:50:01,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 141. [2022-02-14 15:50:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 112 states have internal predecessors, (127), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:50:01,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2022-02-14 15:50:01,455 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 113 [2022-02-14 15:50:01,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:50:01,455 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2022-02-14 15:50:01,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 56 states have internal predecessors, (97), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:50:01,456 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2022-02-14 15:50:01,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-14 15:50:01,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:50:01,456 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:50:01,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-02-14 15:50:01,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:01,657 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:50:01,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:50:01,657 INFO L85 PathProgramCache]: Analyzing trace with hash -970042554, now seen corresponding path program 63 times [2022-02-14 15:50:01,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:50:01,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047215949] [2022-02-14 15:50:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:50:01,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:50:01,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:01,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:50:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:01,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:50:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:01,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:50:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:01,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:50:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:01,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:50:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:01,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 15:50:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:01,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-14 15:50:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:01,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-02-14 15:50:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:01,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-14 15:50:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:01,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-14 15:50:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:01,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-14 15:50:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:01,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-14 15:50:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:01,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-02-14 15:50:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 212 proven. 80 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:50:01,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:50:01,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047215949] [2022-02-14 15:50:01,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047215949] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:50:01,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115896749] [2022-02-14 15:50:01,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:50:01,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:01,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:50:01,986 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:50:01,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-14 15:50:02,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-02-14 15:50:02,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:50:02,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 15:50:02,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:50:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:50:02,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:50:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:50:02,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115896749] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:50:02,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:50:02,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 58 [2022-02-14 15:50:02,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576152098] [2022-02-14 15:50:02,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:50:02,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-14 15:50:02,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:50:02,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-14 15:50:02,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2743, Unknown=0, NotChecked=0, Total=3306 [2022-02-14 15:50:02,963 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 58 states, 58 states have (on average 1.6896551724137931) internal successors, (98), 57 states have internal predecessors, (98), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:50:05,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:50:05,617 INFO L93 Difference]: Finished difference Result 436 states and 534 transitions. [2022-02-14 15:50:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-14 15:50:05,617 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.6896551724137931) internal successors, (98), 57 states have internal predecessors, (98), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-02-14 15:50:05,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:50:05,619 INFO L225 Difference]: With dead ends: 436 [2022-02-14 15:50:05,619 INFO L226 Difference]: Without dead ends: 389 [2022-02-14 15:50:05,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5544 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2774, Invalid=13228, Unknown=0, NotChecked=0, Total=16002 [2022-02-14 15:50:05,620 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 111 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:50:05,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 109 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:50:05,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-02-14 15:50:05,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 141. [2022-02-14 15:50:05,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 112 states have internal predecessors, (127), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:50:05,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2022-02-14 15:50:05,869 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 113 [2022-02-14 15:50:05,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:50:05,869 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2022-02-14 15:50:05,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.6896551724137931) internal successors, (98), 57 states have internal predecessors, (98), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:50:05,869 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2022-02-14 15:50:05,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-14 15:50:05,870 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:50:05,870 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:50:05,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-02-14 15:50:06,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-02-14 15:50:06,093 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:50:06,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:50:06,094 INFO L85 PathProgramCache]: Analyzing trace with hash -928476571, now seen corresponding path program 64 times [2022-02-14 15:50:06,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:50:06,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918342246] [2022-02-14 15:50:06,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:50:06,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:50:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:06,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:50:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:06,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:50:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:06,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:50:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:06,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:50:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:06,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:50:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:06,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 15:50:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:06,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-14 15:50:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:06,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-02-14 15:50:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:06,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-14 15:50:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:06,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-14 15:50:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:06,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-14 15:50:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:06,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-14 15:50:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:06,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-02-14 15:50:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 212 proven. 85 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:50:06,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:50:06,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918342246] [2022-02-14 15:50:06,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918342246] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:50:06,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316219309] [2022-02-14 15:50:06,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:50:06,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:06,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:50:06,440 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:50:06,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-14 15:50:06,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:50:06,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:50:06,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 15:50:06,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:50:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:50:07,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:50:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:50:07,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316219309] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:50:07,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:50:07,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 59 [2022-02-14 15:50:07,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62944844] [2022-02-14 15:50:07,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:50:07,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-14 15:50:07,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:50:07,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-14 15:50:07,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=2831, Unknown=0, NotChecked=0, Total=3422 [2022-02-14 15:50:07,564 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 59 states, 59 states have (on average 1.6779661016949152) internal successors, (99), 58 states have internal predecessors, (99), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:50:09,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:50:09,940 INFO L93 Difference]: Finished difference Result 389 states and 473 transitions. [2022-02-14 15:50:09,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-14 15:50:09,940 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.6779661016949152) internal successors, (99), 58 states have internal predecessors, (99), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-02-14 15:50:09,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:50:09,941 INFO L225 Difference]: With dead ends: 389 [2022-02-14 15:50:09,941 INFO L226 Difference]: Without dead ends: 342 [2022-02-14 15:50:09,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4967 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2517, Invalid=12003, Unknown=0, NotChecked=0, Total=14520 [2022-02-14 15:50:09,942 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 104 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:50:09,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 106 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:50:09,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-02-14 15:50:10,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 141. [2022-02-14 15:50:10,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 112 states have internal predecessors, (127), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:50:10,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2022-02-14 15:50:10,300 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 113 [2022-02-14 15:50:10,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:50:10,300 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2022-02-14 15:50:10,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.6779661016949152) internal successors, (99), 58 states have internal predecessors, (99), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:50:10,300 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2022-02-14 15:50:10,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-14 15:50:10,301 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:50:10,301 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:50:10,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-02-14 15:50:10,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:10,515 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:50:10,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:50:10,516 INFO L85 PathProgramCache]: Analyzing trace with hash 360068902, now seen corresponding path program 65 times [2022-02-14 15:50:10,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:50:10,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781818133] [2022-02-14 15:50:10,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:50:10,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:50:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:10,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:50:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:10,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:50:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:10,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:50:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:10,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:50:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:10,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:50:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:10,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 15:50:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:10,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-14 15:50:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:10,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-02-14 15:50:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:10,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-14 15:50:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:10,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-14 15:50:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:10,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-14 15:50:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:10,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-14 15:50:10,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:10,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-02-14 15:50:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 212 proven. 92 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:50:10,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:50:10,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781818133] [2022-02-14 15:50:10,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781818133] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:50:10,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257711934] [2022-02-14 15:50:10,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:50:10,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:10,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:50:10,813 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:50:10,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-14 15:50:10,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-02-14 15:50:10,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:50:10,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 15:50:10,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:50:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:50:11,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:50:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:50:11,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257711934] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:50:11,819 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:50:11,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 60 [2022-02-14 15:50:11,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092335006] [2022-02-14 15:50:11,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:50:11,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-14 15:50:11,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:50:11,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-14 15:50:11,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=2917, Unknown=0, NotChecked=0, Total=3540 [2022-02-14 15:50:11,821 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 59 states have internal predecessors, (100), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:50:13,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:50:13,938 INFO L93 Difference]: Finished difference Result 341 states and 411 transitions. [2022-02-14 15:50:13,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-14 15:50:13,939 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 59 states have internal predecessors, (100), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-02-14 15:50:13,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:50:13,940 INFO L225 Difference]: With dead ends: 341 [2022-02-14 15:50:13,940 INFO L226 Difference]: Without dead ends: 294 [2022-02-14 15:50:13,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4267 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2203, Invalid=10453, Unknown=0, NotChecked=0, Total=12656 [2022-02-14 15:50:13,941 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 94 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:50:13,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 116 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:50:13,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-02-14 15:50:14,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 141. [2022-02-14 15:50:14,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 112 states have internal predecessors, (127), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:50:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2022-02-14 15:50:14,197 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 113 [2022-02-14 15:50:14,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:50:14,197 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2022-02-14 15:50:14,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 59 states have internal predecessors, (100), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:50:14,197 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2022-02-14 15:50:14,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-14 15:50:14,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:50:14,197 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:50:14,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-02-14 15:50:14,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:14,398 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:50:14,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:50:14,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1650272901, now seen corresponding path program 66 times [2022-02-14 15:50:14,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:50:14,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482569423] [2022-02-14 15:50:14,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:50:14,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:50:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:14,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:50:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:14,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:50:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:14,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:50:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:14,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:50:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:14,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:50:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:14,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 15:50:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:14,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-14 15:50:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:14,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-02-14 15:50:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:14,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-14 15:50:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:14,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-14 15:50:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:14,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-14 15:50:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:14,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-14 15:50:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:14,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-02-14 15:50:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 212 proven. 101 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:50:14,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:50:14,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482569423] [2022-02-14 15:50:14,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482569423] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:50:14,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547064340] [2022-02-14 15:50:14,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:50:14,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:14,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:50:14,702 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:50:14,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-14 15:50:14,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-02-14 15:50:14,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:50:14,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 15:50:14,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:50:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:50:15,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:50:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:50:15,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547064340] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:50:15,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:50:15,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 61 [2022-02-14 15:50:15,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689318331] [2022-02-14 15:50:15,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:50:15,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-14 15:50:15,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:50:15,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-14 15:50:15,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=659, Invalid=3001, Unknown=0, NotChecked=0, Total=3660 [2022-02-14 15:50:15,711 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 61 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 60 states have internal predecessors, (101), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:50:17,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:50:17,399 INFO L93 Difference]: Finished difference Result 292 states and 348 transitions. [2022-02-14 15:50:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-14 15:50:17,399 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 60 states have internal predecessors, (101), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-02-14 15:50:17,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:50:17,400 INFO L225 Difference]: With dead ends: 292 [2022-02-14 15:50:17,400 INFO L226 Difference]: Without dead ends: 245 [2022-02-14 15:50:17,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1856, Invalid=8650, Unknown=0, NotChecked=0, Total=10506 [2022-02-14 15:50:17,400 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 66 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:50:17,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 103 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:50:17,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-14 15:50:17,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 141. [2022-02-14 15:50:17,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 112 states have internal predecessors, (127), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:50:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2022-02-14 15:50:17,661 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 113 [2022-02-14 15:50:17,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:50:17,661 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2022-02-14 15:50:17,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 60 states have internal predecessors, (101), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:50:17,661 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2022-02-14 15:50:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-14 15:50:17,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:50:17,662 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:50:17,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-02-14 15:50:17,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-02-14 15:50:17,862 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:50:17,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:50:17,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1303076090, now seen corresponding path program 12 times [2022-02-14 15:50:17,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:50:17,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114127622] [2022-02-14 15:50:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:50:17,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:50:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:18,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:50:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:18,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 15:50:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:18,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 15:50:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:18,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:50:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:18,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 15:50:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:18,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 15:50:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:18,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-14 15:50:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:18,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-02-14 15:50:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:18,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-14 15:50:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:18,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-14 15:50:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:18,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-14 15:50:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:18,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-14 15:50:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:18,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-02-14 15:50:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 212 proven. 112 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:50:18,160 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:50:18,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114127622] [2022-02-14 15:50:18,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114127622] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:50:18,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908772419] [2022-02-14 15:50:18,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:50:18,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:18,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:50:18,162 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:50:18,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-14 15:50:18,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-02-14 15:50:18,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:50:18,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 15:50:18,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:50:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:50:19,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:50:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:50:19,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908772419] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:50:19,201 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:50:19,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-02-14 15:50:19,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236391730] [2022-02-14 15:50:19,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:50:19,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-14 15:50:19,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:50:19,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-14 15:50:19,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=3083, Unknown=0, NotChecked=0, Total=3782 [2022-02-14 15:50:19,202 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 62 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 61 states have internal predecessors, (102), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:50:20,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:50:20,493 INFO L93 Difference]: Finished difference Result 242 states and 284 transitions. [2022-02-14 15:50:20,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-14 15:50:20,494 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 61 states have internal predecessors, (102), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-02-14 15:50:20,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:50:20,494 INFO L225 Difference]: With dead ends: 242 [2022-02-14 15:50:20,494 INFO L226 Difference]: Without dead ends: 195 [2022-02-14 15:50:20,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1520, Invalid=6670, Unknown=0, NotChecked=0, Total=8190 [2022-02-14 15:50:20,495 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 48 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:50:20,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 105 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:50:20,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-02-14 15:50:20,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2022-02-14 15:50:20,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 113 states have (on average 1.1415929203539823) internal successors, (129), 114 states have internal predecessors, (129), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:50:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2022-02-14 15:50:20,779 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 113 [2022-02-14 15:50:20,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:50:20,779 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2022-02-14 15:50:20,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 61 states have internal predecessors, (102), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 15:50:20,779 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2022-02-14 15:50:20,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-02-14 15:50:20,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:50:20,780 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:50:20,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-02-14 15:50:20,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-02-14 15:50:20,983 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:50:20,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:50:20,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2021616956, now seen corresponding path program 24 times [2022-02-14 15:50:20,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:50:20,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237178215] [2022-02-14 15:50:20,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:50:20,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:50:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:21,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:50:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:21,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:50:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:21,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:50:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:21,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:50:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:21,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:50:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:21,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:50:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:21,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-14 15:50:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:21,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-14 15:50:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:21,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-14 15:50:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:21,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-14 15:50:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:21,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-02-14 15:50:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:21,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-14 15:50:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:21,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 15:50:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 102 proven. 235 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:50:21,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:50:21,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237178215] [2022-02-14 15:50:21,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237178215] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:50:21,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114199458] [2022-02-14 15:50:21,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:50:21,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:21,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:50:21,139 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:50:21,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-14 15:50:21,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-02-14 15:50:21,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:50:21,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-14 15:50:21,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:50:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 115 proven. 222 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:50:21,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:50:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 115 proven. 222 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 15:50:21,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114199458] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:50:21,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:50:21,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 22 [2022-02-14 15:50:21,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722847913] [2022-02-14 15:50:21,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:50:21,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-14 15:50:21,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:50:21,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-14 15:50:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2022-02-14 15:50:21,526 INFO L87 Difference]: Start difference. First operand 143 states and 158 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 19 states have internal predecessors, (60), 14 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 15:50:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:50:22,169 INFO L93 Difference]: Finished difference Result 156 states and 172 transitions. [2022-02-14 15:50:22,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-14 15:50:22,169 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 19 states have internal predecessors, (60), 14 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 114 [2022-02-14 15:50:22,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:50:22,170 INFO L225 Difference]: With dead ends: 156 [2022-02-14 15:50:22,170 INFO L226 Difference]: Without dead ends: 154 [2022-02-14 15:50:22,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 262 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=397, Invalid=1163, Unknown=0, NotChecked=0, Total=1560 [2022-02-14 15:50:22,170 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 94 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:50:22,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 80 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 15:50:22,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-02-14 15:50:22,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2022-02-14 15:50:22,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 15:50:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2022-02-14 15:50:22,460 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 114 [2022-02-14 15:50:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:50:22,461 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2022-02-14 15:50:22,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 19 states have internal predecessors, (60), 14 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 15:50:22,461 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2022-02-14 15:50:22,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-14 15:50:22,461 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:50:22,461 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:50:22,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-02-14 15:50:22,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:22,663 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:50:22,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:50:22,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1152551267, now seen corresponding path program 25 times [2022-02-14 15:50:22,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:50:22,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181451453] [2022-02-14 15:50:22,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:50:22,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:50:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:22,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:50:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:22,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:50:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:22,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:50:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:22,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:50:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:22,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:50:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:22,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:50:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:22,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-14 15:50:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:22,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-14 15:50:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:22,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-14 15:50:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:22,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-14 15:50:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:22,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-02-14 15:50:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:22,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-14 15:50:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:22,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 15:50:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:22,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-02-14 15:50:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 249 proven. 128 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:22,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:50:22,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181451453] [2022-02-14 15:50:22,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181451453] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:50:22,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999269429] [2022-02-14 15:50:22,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:50:22,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:22,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:50:22,987 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:50:22,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-14 15:50:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:23,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-14 15:50:23,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:50:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:23,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:50:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:23,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999269429] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:50:23,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:50:23,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 53 [2022-02-14 15:50:23,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450495277] [2022-02-14 15:50:23,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:50:23,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-14 15:50:23,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:50:23,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-14 15:50:23,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=2210, Unknown=0, NotChecked=0, Total=2756 [2022-02-14 15:50:23,905 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 53 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 52 states have internal predecessors, (95), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:50:27,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:50:27,765 INFO L93 Difference]: Finished difference Result 883 states and 1123 transitions. [2022-02-14 15:50:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-14 15:50:27,765 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 52 states have internal predecessors, (95), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-02-14 15:50:27,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:50:27,768 INFO L225 Difference]: With dead ends: 883 [2022-02-14 15:50:27,768 INFO L226 Difference]: Without dead ends: 833 [2022-02-14 15:50:27,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3912 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2146, Invalid=9844, Unknown=0, NotChecked=0, Total=11990 [2022-02-14 15:50:27,769 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 294 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:50:27,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 139 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:50:27,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-02-14 15:50:28,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 151. [2022-02-14 15:50:28,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 120 states have internal predecessors, (136), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 15:50:28,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2022-02-14 15:50:28,081 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 121 [2022-02-14 15:50:28,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:50:28,081 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2022-02-14 15:50:28,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 52 states have internal predecessors, (95), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:50:28,081 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2022-02-14 15:50:28,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-14 15:50:28,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:50:28,081 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:50:28,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-02-14 15:50:28,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:28,282 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:50:28,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:50:28,282 INFO L85 PathProgramCache]: Analyzing trace with hash -93033884, now seen corresponding path program 67 times [2022-02-14 15:50:28,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:50:28,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353446865] [2022-02-14 15:50:28,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:50:28,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:50:28,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:28,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:50:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:28,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:50:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:28,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:50:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:28,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:50:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:28,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:50:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:28,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:50:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:28,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-14 15:50:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:28,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-14 15:50:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:28,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-14 15:50:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:28,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-14 15:50:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:28,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-02-14 15:50:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:28,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-14 15:50:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:28,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 15:50:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:28,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-02-14 15:50:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 249 proven. 116 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:28,601 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:50:28,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353446865] [2022-02-14 15:50:28,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353446865] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:50:28,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521148899] [2022-02-14 15:50:28,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:50:28,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:28,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:50:28,602 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:50:28,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-14 15:50:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:28,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-14 15:50:28,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:50:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:29,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:50:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:29,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521148899] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:50:29,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:50:29,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 54 [2022-02-14 15:50:29,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50546191] [2022-02-14 15:50:29,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:50:29,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-14 15:50:29,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:50:29,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-14 15:50:29,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2321, Unknown=0, NotChecked=0, Total=2862 [2022-02-14 15:50:29,614 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand has 54 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 53 states have internal predecessors, (96), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:50:33,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:50:33,648 INFO L93 Difference]: Finished difference Result 841 states and 1066 transitions. [2022-02-14 15:50:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-14 15:50:33,649 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 53 states have internal predecessors, (96), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-02-14 15:50:33,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:50:33,651 INFO L225 Difference]: With dead ends: 841 [2022-02-14 15:50:33,651 INFO L226 Difference]: Without dead ends: 791 [2022-02-14 15:50:33,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5005 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2536, Invalid=11984, Unknown=0, NotChecked=0, Total=14520 [2022-02-14 15:50:33,652 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 239 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:50:33,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 146 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:50:33,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-02-14 15:50:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 151. [2022-02-14 15:50:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 120 states have internal predecessors, (136), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 15:50:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2022-02-14 15:50:34,077 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 121 [2022-02-14 15:50:34,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:50:34,077 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2022-02-14 15:50:34,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 53 states have internal predecessors, (96), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:50:34,077 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2022-02-14 15:50:34,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-14 15:50:34,078 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:50:34,078 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:50:34,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-02-14 15:50:34,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-02-14 15:50:34,291 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:50:34,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:50:34,292 INFO L85 PathProgramCache]: Analyzing trace with hash -51467901, now seen corresponding path program 68 times [2022-02-14 15:50:34,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:50:34,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174008775] [2022-02-14 15:50:34,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:50:34,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:50:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:34,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:50:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:34,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:50:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:34,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:50:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:34,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:50:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:34,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:50:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:34,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:50:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:34,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-14 15:50:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:34,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-14 15:50:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:34,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-14 15:50:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:34,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-14 15:50:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:34,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-02-14 15:50:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:34,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-14 15:50:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:34,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 15:50:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:34,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-02-14 15:50:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 249 proven. 106 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:34,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:50:34,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174008775] [2022-02-14 15:50:34,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174008775] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:50:34,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189045299] [2022-02-14 15:50:34,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:50:34,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:34,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:50:34,611 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:50:34,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-14 15:50:34,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:50:34,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:50:34,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-14 15:50:34,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:50:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:35,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:50:35,546 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:35,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189045299] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:50:35,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:50:35,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 55 [2022-02-14 15:50:35,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698133619] [2022-02-14 15:50:35,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:50:35,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-14 15:50:35,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:50:35,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-14 15:50:35,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=2430, Unknown=0, NotChecked=0, Total=2970 [2022-02-14 15:50:35,548 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:50:39,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:50:39,655 INFO L93 Difference]: Finished difference Result 798 states and 1008 transitions. [2022-02-14 15:50:39,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-14 15:50:39,655 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-02-14 15:50:39,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:50:39,657 INFO L225 Difference]: With dead ends: 798 [2022-02-14 15:50:39,657 INFO L226 Difference]: Without dead ends: 748 [2022-02-14 15:50:39,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5967 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2912, Invalid=13858, Unknown=0, NotChecked=0, Total=16770 [2022-02-14 15:50:39,658 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 240 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:50:39,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 136 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1611 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:50:39,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-02-14 15:50:39,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 151. [2022-02-14 15:50:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 120 states have internal predecessors, (136), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 15:50:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2022-02-14 15:50:39,965 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 121 [2022-02-14 15:50:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:50:39,965 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2022-02-14 15:50:39,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:50:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2022-02-14 15:50:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-14 15:50:39,966 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:50:39,966 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:50:39,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-02-14 15:50:40,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-02-14 15:50:40,167 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:50:40,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:50:40,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1237077572, now seen corresponding path program 69 times [2022-02-14 15:50:40,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:50:40,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970442721] [2022-02-14 15:50:40,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:50:40,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:50:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:40,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:50:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:40,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:50:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:40,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:50:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:40,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:50:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:40,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:50:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:40,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:50:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:40,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-14 15:50:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:40,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-14 15:50:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:40,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-14 15:50:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:40,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-14 15:50:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:40,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-02-14 15:50:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:40,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-14 15:50:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:40,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 15:50:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:40,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-02-14 15:50:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 249 proven. 98 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:40,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:50:40,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970442721] [2022-02-14 15:50:40,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970442721] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:50:40,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522654760] [2022-02-14 15:50:40,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:50:40,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:40,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:50:40,498 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:50:40,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-14 15:50:40,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-02-14 15:50:40,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:50:40,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-14 15:50:40,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:50:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:41,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:50:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:41,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522654760] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:50:41,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:50:41,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 56 [2022-02-14 15:50:41,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451104331] [2022-02-14 15:50:41,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:50:41,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-14 15:50:41,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:50:41,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-14 15:50:41,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=2537, Unknown=0, NotChecked=0, Total=3080 [2022-02-14 15:50:41,485 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand has 56 states, 56 states have (on average 1.75) internal successors, (98), 55 states have internal predecessors, (98), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:50:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:50:45,639 INFO L93 Difference]: Finished difference Result 754 states and 949 transitions. [2022-02-14 15:50:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-14 15:50:45,639 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.75) internal successors, (98), 55 states have internal predecessors, (98), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-02-14 15:50:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:50:45,640 INFO L225 Difference]: With dead ends: 754 [2022-02-14 15:50:45,640 INFO L226 Difference]: Without dead ends: 704 [2022-02-14 15:50:45,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6709 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3232, Invalid=15400, Unknown=0, NotChecked=0, Total=18632 [2022-02-14 15:50:45,641 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 251 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:50:45,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 122 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 1374 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:50:45,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-02-14 15:50:45,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 151. [2022-02-14 15:50:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 120 states have internal predecessors, (136), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 15:50:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2022-02-14 15:50:45,949 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 121 [2022-02-14 15:50:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:50:45,950 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2022-02-14 15:50:45,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.75) internal successors, (98), 55 states have internal predecessors, (98), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:50:45,950 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2022-02-14 15:50:45,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-14 15:50:45,950 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:50:45,950 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:50:45,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-02-14 15:50:46,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:46,151 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:50:46,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:50:46,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1767685725, now seen corresponding path program 70 times [2022-02-14 15:50:46,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:50:46,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802757825] [2022-02-14 15:50:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:50:46,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:50:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:46,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:50:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:46,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:50:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:46,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:50:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:46,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:50:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:46,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:50:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:46,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:50:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:46,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-14 15:50:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:46,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-14 15:50:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:46,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-14 15:50:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:46,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-14 15:50:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:46,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-02-14 15:50:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:46,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-14 15:50:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:46,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 15:50:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:46,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-02-14 15:50:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 249 proven. 92 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:46,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:50:46,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802757825] [2022-02-14 15:50:46,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802757825] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:50:46,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931016147] [2022-02-14 15:50:46,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:50:46,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:46,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:50:46,477 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:50:46,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-14 15:50:46,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:50:46,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:50:46,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-14 15:50:46,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:50:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:47,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:50:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:47,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931016147] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:50:47,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:50:47,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 57 [2022-02-14 15:50:47,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554586216] [2022-02-14 15:50:47,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:50:47,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-14 15:50:47,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:50:47,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-14 15:50:47,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=2642, Unknown=0, NotChecked=0, Total=3192 [2022-02-14 15:50:47,481 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand has 57 states, 57 states have (on average 1.736842105263158) internal successors, (99), 56 states have internal predecessors, (99), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:50:51,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:50:51,711 INFO L93 Difference]: Finished difference Result 709 states and 889 transitions. [2022-02-14 15:50:51,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-14 15:50:51,711 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.736842105263158) internal successors, (99), 56 states have internal predecessors, (99), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-02-14 15:50:51,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:50:51,712 INFO L225 Difference]: With dead ends: 709 [2022-02-14 15:50:51,712 INFO L226 Difference]: Without dead ends: 659 [2022-02-14 15:50:51,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7236 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3475, Invalid=16547, Unknown=0, NotChecked=0, Total=20022 [2022-02-14 15:50:51,713 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 200 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:50:51,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 139 Invalid, 2052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:50:51,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-02-14 15:50:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 151. [2022-02-14 15:50:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 120 states have internal predecessors, (136), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 15:50:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2022-02-14 15:50:52,029 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 121 [2022-02-14 15:50:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:50:52,029 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2022-02-14 15:50:52,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.736842105263158) internal successors, (99), 56 states have internal predecessors, (99), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:50:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2022-02-14 15:50:52,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-14 15:50:52,029 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:50:52,029 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:50:52,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-02-14 15:50:52,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:52,230 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:50:52,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:50:52,230 INFO L85 PathProgramCache]: Analyzing trace with hash -426067420, now seen corresponding path program 71 times [2022-02-14 15:50:52,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:50:52,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863457630] [2022-02-14 15:50:52,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:50:52,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:50:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:52,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:50:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:52,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:50:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:52,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:50:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:52,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:50:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:52,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:50:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:52,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:50:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:52,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-14 15:50:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:52,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-14 15:50:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:52,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-14 15:50:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:52,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-14 15:50:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:52,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-02-14 15:50:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:52,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-14 15:50:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:52,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 15:50:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:52,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-02-14 15:50:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 249 proven. 88 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:52,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:50:52,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863457630] [2022-02-14 15:50:52,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863457630] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:50:52,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968129504] [2022-02-14 15:50:52,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:50:52,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:52,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:50:52,556 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:50:52,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-14 15:50:52,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-02-14 15:50:52,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:50:52,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-14 15:50:52,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:50:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:53,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:50:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:53,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968129504] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:50:53,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:50:53,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 58 [2022-02-14 15:50:53,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692584608] [2022-02-14 15:50:53,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:50:53,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-14 15:50:53,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:50:53,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-14 15:50:53,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=2745, Unknown=0, NotChecked=0, Total=3306 [2022-02-14 15:50:53,584 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand has 58 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 57 states have internal predecessors, (100), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:50:57,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:50:57,741 INFO L93 Difference]: Finished difference Result 663 states and 828 transitions. [2022-02-14 15:50:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-14 15:50:57,742 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 57 states have internal predecessors, (100), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-02-14 15:50:57,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:50:57,743 INFO L225 Difference]: With dead ends: 663 [2022-02-14 15:50:57,743 INFO L226 Difference]: Without dead ends: 613 [2022-02-14 15:50:57,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7535 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3626, Invalid=17254, Unknown=0, NotChecked=0, Total=20880 [2022-02-14 15:50:57,744 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 203 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:50:57,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 113 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:50:57,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-02-14 15:50:58,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 151. [2022-02-14 15:50:58,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 120 states have internal predecessors, (136), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 15:50:58,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2022-02-14 15:50:58,061 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 121 [2022-02-14 15:50:58,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:50:58,061 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2022-02-14 15:50:58,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 57 states have internal predecessors, (100), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:50:58,061 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2022-02-14 15:50:58,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-14 15:50:58,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:50:58,062 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:50:58,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-02-14 15:50:58,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-02-14 15:50:58,262 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:50:58,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:50:58,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1785572925, now seen corresponding path program 72 times [2022-02-14 15:50:58,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:50:58,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070508613] [2022-02-14 15:50:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:50:58,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:50:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:58,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:50:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:58,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:50:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:58,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:50:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:58,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:50:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:58,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:50:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:58,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:50:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:58,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-14 15:50:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:58,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-14 15:50:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:58,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-14 15:50:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:58,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-14 15:50:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:58,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-02-14 15:50:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:58,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-14 15:50:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:58,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 15:50:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:58,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-02-14 15:50:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:50:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 249 proven. 86 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:58,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:50:58,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070508613] [2022-02-14 15:50:58,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070508613] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:50:58,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440892787] [2022-02-14 15:50:58,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:50:58,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:50:58,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:50:58,624 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:50:58,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-14 15:50:58,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-02-14 15:50:58,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:50:58,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-14 15:50:58,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:50:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:59,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:50:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:50:59,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440892787] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:50:59,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:50:59,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 59 [2022-02-14 15:50:59,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402913601] [2022-02-14 15:50:59,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:50:59,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-14 15:50:59,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:50:59,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-14 15:50:59,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=2846, Unknown=0, NotChecked=0, Total=3422 [2022-02-14 15:50:59,651 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand has 59 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 58 states have internal predecessors, (101), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:51:03,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:51:03,766 INFO L93 Difference]: Finished difference Result 616 states and 766 transitions. [2022-02-14 15:51:03,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-14 15:51:03,766 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 58 states have internal predecessors, (101), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-02-14 15:51:03,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:51:03,767 INFO L225 Difference]: With dead ends: 616 [2022-02-14 15:51:03,767 INFO L226 Difference]: Without dead ends: 566 [2022-02-14 15:51:03,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7605 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3676, Invalid=17494, Unknown=0, NotChecked=0, Total=21170 [2022-02-14 15:51:03,769 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 166 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:51:03,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 133 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 1613 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:51:03,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-02-14 15:51:04,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 151. [2022-02-14 15:51:04,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 120 states have internal predecessors, (136), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 15:51:04,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2022-02-14 15:51:04,092 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 121 [2022-02-14 15:51:04,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:51:04,092 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2022-02-14 15:51:04,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 58 states have internal predecessors, (101), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:51:04,092 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2022-02-14 15:51:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-14 15:51:04,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:51:04,092 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:51:04,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-02-14 15:51:04,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-02-14 15:51:04,293 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:51:04,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:51:04,293 INFO L85 PathProgramCache]: Analyzing trace with hash -980570620, now seen corresponding path program 73 times [2022-02-14 15:51:04,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:51:04,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670614243] [2022-02-14 15:51:04,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:51:04,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:51:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:04,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:51:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:04,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:51:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:04,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:51:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:04,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:51:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:04,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:51:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:04,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:51:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:04,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-14 15:51:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:04,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-14 15:51:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:04,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-14 15:51:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:04,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-14 15:51:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:04,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-02-14 15:51:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:04,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-14 15:51:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:04,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 15:51:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:04,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-02-14 15:51:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 249 proven. 86 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:04,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:51:04,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670614243] [2022-02-14 15:51:04,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670614243] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:51:04,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191570965] [2022-02-14 15:51:04,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:51:04,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:51:04,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:51:04,620 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:51:04,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-14 15:51:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:04,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-14 15:51:04,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:51:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:05,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:51:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:05,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191570965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:51:05,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:51:05,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 60 [2022-02-14 15:51:05,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090420882] [2022-02-14 15:51:05,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:51:05,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-14 15:51:05,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:51:05,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-14 15:51:05,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=2945, Unknown=0, NotChecked=0, Total=3540 [2022-02-14 15:51:05,656 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand has 60 states, 60 states have (on average 1.7) internal successors, (102), 59 states have internal predecessors, (102), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:51:09,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:51:09,602 INFO L93 Difference]: Finished difference Result 568 states and 703 transitions. [2022-02-14 15:51:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-14 15:51:09,602 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.7) internal successors, (102), 59 states have internal predecessors, (102), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-02-14 15:51:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:51:09,603 INFO L225 Difference]: With dead ends: 568 [2022-02-14 15:51:09,603 INFO L226 Difference]: Without dead ends: 518 [2022-02-14 15:51:09,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7452 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3622, Invalid=17258, Unknown=0, NotChecked=0, Total=20880 [2022-02-14 15:51:09,604 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 156 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:51:09,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 125 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:51:09,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-02-14 15:51:09,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 151. [2022-02-14 15:51:09,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 120 states have internal predecessors, (136), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 15:51:09,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2022-02-14 15:51:09,941 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 121 [2022-02-14 15:51:09,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:51:09,941 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2022-02-14 15:51:09,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.7) internal successors, (102), 59 states have internal predecessors, (102), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:51:09,941 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2022-02-14 15:51:09,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-14 15:51:09,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:51:09,942 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:51:09,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-02-14 15:51:10,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-02-14 15:51:10,144 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:51:10,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:51:10,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1795302941, now seen corresponding path program 74 times [2022-02-14 15:51:10,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:51:10,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276575544] [2022-02-14 15:51:10,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:51:10,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:51:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:10,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:51:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:10,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:51:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:10,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:51:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:10,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:51:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:10,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:51:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:10,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:51:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:10,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-14 15:51:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:10,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-14 15:51:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:10,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-14 15:51:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:10,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-14 15:51:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:10,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-02-14 15:51:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:10,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-14 15:51:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:10,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 15:51:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:10,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-02-14 15:51:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 249 proven. 88 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:10,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:51:10,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276575544] [2022-02-14 15:51:10,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276575544] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:51:10,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883451295] [2022-02-14 15:51:10,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:51:10,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:51:10,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:51:10,500 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:51:10,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-14 15:51:10,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:51:10,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:51:10,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-14 15:51:10,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:51:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:11,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:51:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:11,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883451295] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:51:11,574 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:51:11,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 61 [2022-02-14 15:51:11,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853188] [2022-02-14 15:51:11,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:51:11,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-14 15:51:11,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:51:11,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-14 15:51:11,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=3042, Unknown=0, NotChecked=0, Total=3660 [2022-02-14 15:51:11,575 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand has 61 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 60 states have internal predecessors, (103), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:51:15,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:51:15,226 INFO L93 Difference]: Finished difference Result 519 states and 639 transitions. [2022-02-14 15:51:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-14 15:51:15,226 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 60 states have internal predecessors, (103), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-02-14 15:51:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:51:15,227 INFO L225 Difference]: With dead ends: 519 [2022-02-14 15:51:15,227 INFO L226 Difference]: Without dead ends: 469 [2022-02-14 15:51:15,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7084 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3467, Invalid=16555, Unknown=0, NotChecked=0, Total=20022 [2022-02-14 15:51:15,228 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 134 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:51:15,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 118 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:51:15,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-02-14 15:51:15,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 151. [2022-02-14 15:51:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 120 states have internal predecessors, (136), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 15:51:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2022-02-14 15:51:15,562 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 121 [2022-02-14 15:51:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:51:15,562 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2022-02-14 15:51:15,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 60 states have internal predecessors, (103), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:51:15,562 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2022-02-14 15:51:15,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-14 15:51:15,562 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:51:15,563 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:51:15,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-02-14 15:51:15,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-02-14 15:51:15,763 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:51:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:51:15,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1282201116, now seen corresponding path program 75 times [2022-02-14 15:51:15,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:51:15,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856234360] [2022-02-14 15:51:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:51:15,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:51:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:16,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:51:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:16,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:51:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:16,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:51:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:16,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:51:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:16,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:51:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:16,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:51:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:16,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-14 15:51:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:16,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-14 15:51:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:16,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-14 15:51:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:16,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-14 15:51:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:16,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-02-14 15:51:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:16,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-14 15:51:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:16,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 15:51:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:16,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-02-14 15:51:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 249 proven. 92 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:16,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:51:16,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856234360] [2022-02-14 15:51:16,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856234360] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:51:16,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112576155] [2022-02-14 15:51:16,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:51:16,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:51:16,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:51:16,092 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:51:16,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-14 15:51:16,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-02-14 15:51:16,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:51:16,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-14 15:51:16,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:51:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:17,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:51:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:17,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112576155] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:51:17,242 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:51:17,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 62 [2022-02-14 15:51:17,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624207658] [2022-02-14 15:51:17,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:51:17,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-14 15:51:17,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:51:17,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-14 15:51:17,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=645, Invalid=3137, Unknown=0, NotChecked=0, Total=3782 [2022-02-14 15:51:17,243 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand has 62 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 61 states have internal predecessors, (104), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:51:20,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:51:20,552 INFO L93 Difference]: Finished difference Result 469 states and 574 transitions. [2022-02-14 15:51:20,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-14 15:51:20,553 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 61 states have internal predecessors, (104), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-02-14 15:51:20,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:51:20,554 INFO L225 Difference]: With dead ends: 469 [2022-02-14 15:51:20,554 INFO L226 Difference]: Without dead ends: 419 [2022-02-14 15:51:20,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6520 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3220, Invalid=15412, Unknown=0, NotChecked=0, Total=18632 [2022-02-14 15:51:20,555 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 129 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:51:20,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 86 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:51:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-02-14 15:51:20,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 151. [2022-02-14 15:51:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 120 states have internal predecessors, (136), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 15:51:20,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2022-02-14 15:51:20,892 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 121 [2022-02-14 15:51:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:51:20,893 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2022-02-14 15:51:20,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 61 states have internal predecessors, (104), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:51:20,893 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2022-02-14 15:51:20,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-14 15:51:20,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:51:20,893 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:51:20,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-02-14 15:51:21,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:51:21,094 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:51:21,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:51:21,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1739053571, now seen corresponding path program 76 times [2022-02-14 15:51:21,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:51:21,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622657948] [2022-02-14 15:51:21,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:51:21,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:51:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:21,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:51:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:21,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:51:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:21,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:51:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:21,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:51:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:21,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:51:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:21,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:51:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:21,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-14 15:51:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:21,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-14 15:51:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:21,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-14 15:51:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:21,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-14 15:51:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:21,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-02-14 15:51:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:21,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-14 15:51:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:21,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 15:51:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:21,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-02-14 15:51:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 249 proven. 98 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:21,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:51:21,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622657948] [2022-02-14 15:51:21,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622657948] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:51:21,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806718765] [2022-02-14 15:51:21,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:51:21,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:51:21,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:51:21,441 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:51:21,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-14 15:51:21,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:51:21,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:51:21,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-14 15:51:21,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:51:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:22,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:51:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:22,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806718765] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:51:22,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:51:22,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 63 [2022-02-14 15:51:22,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523099436] [2022-02-14 15:51:22,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:51:22,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-14 15:51:22,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:51:22,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-14 15:51:22,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=676, Invalid=3230, Unknown=0, NotChecked=0, Total=3906 [2022-02-14 15:51:22,536 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand has 63 states, 63 states have (on average 1.6666666666666667) internal successors, (105), 62 states have internal predecessors, (105), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:51:25,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:51:25,532 INFO L93 Difference]: Finished difference Result 418 states and 508 transitions. [2022-02-14 15:51:25,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-14 15:51:25,532 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.6666666666666667) internal successors, (105), 62 states have internal predecessors, (105), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-02-14 15:51:25,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:51:25,533 INFO L225 Difference]: With dead ends: 418 [2022-02-14 15:51:25,533 INFO L226 Difference]: Without dead ends: 368 [2022-02-14 15:51:25,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5791 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2896, Invalid=13874, Unknown=0, NotChecked=0, Total=16770 [2022-02-14 15:51:25,534 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 94 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:51:25,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 116 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:51:25,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-02-14 15:51:25,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 151. [2022-02-14 15:51:25,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 120 states have internal predecessors, (136), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 15:51:25,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2022-02-14 15:51:25,877 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 121 [2022-02-14 15:51:25,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:51:25,877 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2022-02-14 15:51:25,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.6666666666666667) internal successors, (105), 62 states have internal predecessors, (105), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:51:25,878 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2022-02-14 15:51:25,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-14 15:51:25,878 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:51:25,878 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:51:25,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-02-14 15:51:26,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:51:26,079 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:51:26,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:51:26,079 INFO L85 PathProgramCache]: Analyzing trace with hash 908668356, now seen corresponding path program 77 times [2022-02-14 15:51:26,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:51:26,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326234910] [2022-02-14 15:51:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:51:26,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:51:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:26,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:51:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:26,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:51:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:26,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:51:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:26,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:51:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:26,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:51:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:26,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:51:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:26,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-14 15:51:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:26,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-14 15:51:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:26,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-14 15:51:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:26,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-14 15:51:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:26,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-02-14 15:51:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:26,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-14 15:51:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:26,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 15:51:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:26,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-02-14 15:51:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 249 proven. 106 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:26,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:51:26,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326234910] [2022-02-14 15:51:26,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326234910] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:51:26,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798981211] [2022-02-14 15:51:26,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:51:26,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:51:26,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:51:26,406 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:51:26,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-14 15:51:26,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-02-14 15:51:26,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:51:26,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-14 15:51:26,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:51:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:27,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:51:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:27,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798981211] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:51:27,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:51:27,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 64 [2022-02-14 15:51:27,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131069330] [2022-02-14 15:51:27,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:51:27,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-14 15:51:27,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:51:27,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-14 15:51:27,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=3321, Unknown=0, NotChecked=0, Total=4032 [2022-02-14 15:51:27,523 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand has 64 states, 64 states have (on average 1.65625) internal successors, (106), 63 states have internal predecessors, (106), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:51:30,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:51:30,136 INFO L93 Difference]: Finished difference Result 366 states and 441 transitions. [2022-02-14 15:51:30,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-14 15:51:30,136 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.65625) internal successors, (106), 63 states have internal predecessors, (106), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-02-14 15:51:30,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:51:30,137 INFO L225 Difference]: With dead ends: 366 [2022-02-14 15:51:30,137 INFO L226 Difference]: Without dead ends: 316 [2022-02-14 15:51:30,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4940 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2516, Invalid=12004, Unknown=0, NotChecked=0, Total=14520 [2022-02-14 15:51:30,138 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 82 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:51:30,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 103 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:51:30,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-14 15:51:30,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 151. [2022-02-14 15:51:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 120 states have internal predecessors, (136), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 15:51:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2022-02-14 15:51:30,494 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 121 [2022-02-14 15:51:30,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:51:30,495 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2022-02-14 15:51:30,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.65625) internal successors, (106), 63 states have internal predecessors, (106), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:51:30,495 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2022-02-14 15:51:30,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-14 15:51:30,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:51:30,495 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:51:30,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-02-14 15:51:30,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-02-14 15:51:30,696 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:51:30,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:51:30,696 INFO L85 PathProgramCache]: Analyzing trace with hash 936530467, now seen corresponding path program 78 times [2022-02-14 15:51:30,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:51:30,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807756705] [2022-02-14 15:51:30,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:51:30,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:51:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:31,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:51:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:31,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:51:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:31,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:51:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:31,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:51:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:31,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:51:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:31,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:51:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:31,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-14 15:51:31,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:31,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-14 15:51:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:31,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-14 15:51:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:31,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-14 15:51:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:31,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-02-14 15:51:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:31,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-14 15:51:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:31,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 15:51:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:31,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-02-14 15:51:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 249 proven. 116 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:31,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:51:31,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807756705] [2022-02-14 15:51:31,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807756705] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:51:31,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958217329] [2022-02-14 15:51:31,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:51:31,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:51:31,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:51:31,040 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:51:31,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-14 15:51:31,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-02-14 15:51:31,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:51:31,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-14 15:51:31,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:51:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:31,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:51:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:32,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958217329] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:51:32,159 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:51:32,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 65 [2022-02-14 15:51:32,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592896780] [2022-02-14 15:51:32,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:51:32,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-14 15:51:32,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:51:32,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-14 15:51:32,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=750, Invalid=3410, Unknown=0, NotChecked=0, Total=4160 [2022-02-14 15:51:32,160 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand has 65 states, 65 states have (on average 1.646153846153846) internal successors, (107), 64 states have internal predecessors, (107), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:51:34,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:51:34,241 INFO L93 Difference]: Finished difference Result 313 states and 373 transitions. [2022-02-14 15:51:34,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-14 15:51:34,241 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.646153846153846) internal successors, (107), 64 states have internal predecessors, (107), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-02-14 15:51:34,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:51:34,242 INFO L225 Difference]: With dead ends: 313 [2022-02-14 15:51:34,242 INFO L226 Difference]: Without dead ends: 263 [2022-02-14 15:51:34,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4007 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2107, Invalid=9883, Unknown=0, NotChecked=0, Total=11990 [2022-02-14 15:51:34,243 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 76 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:51:34,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 80 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:51:34,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-02-14 15:51:34,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 151. [2022-02-14 15:51:34,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 120 states have internal predecessors, (136), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 15:51:34,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2022-02-14 15:51:34,603 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 121 [2022-02-14 15:51:34,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:51:34,603 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2022-02-14 15:51:34,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.646153846153846) internal successors, (107), 64 states have internal predecessors, (107), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:51:34,603 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2022-02-14 15:51:34,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-14 15:51:34,603 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:51:34,603 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:51:34,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-02-14 15:51:34,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:51:34,804 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:51:34,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:51:34,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1800255908, now seen corresponding path program 13 times [2022-02-14 15:51:34,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:51:34,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522139399] [2022-02-14 15:51:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:51:34,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:51:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:35,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:51:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:35,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-14 15:51:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:35,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:51:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:35,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-14 15:51:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:35,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:51:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:35,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-14 15:51:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:35,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-14 15:51:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:35,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-14 15:51:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:35,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-14 15:51:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:35,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-14 15:51:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:35,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-02-14 15:51:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:35,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-14 15:51:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:35,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 15:51:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:35,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-02-14 15:51:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 249 proven. 128 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:35,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:51:35,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522139399] [2022-02-14 15:51:35,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522139399] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:51:35,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074002468] [2022-02-14 15:51:35,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:51:35,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:51:35,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:51:35,141 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:51:35,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-14 15:51:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:35,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-14 15:51:35,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:51:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:36,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:51:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:36,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074002468] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:51:36,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:51:36,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-02-14 15:51:36,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145720204] [2022-02-14 15:51:36,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:51:36,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-14 15:51:36,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:51:36,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-14 15:51:36,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=3497, Unknown=0, NotChecked=0, Total=4290 [2022-02-14 15:51:36,285 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand has 66 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 65 states have internal predecessors, (108), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:51:37,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:51:37,874 INFO L93 Difference]: Finished difference Result 259 states and 304 transitions. [2022-02-14 15:51:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-14 15:51:37,875 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 65 states have internal predecessors, (108), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-02-14 15:51:37,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:51:37,875 INFO L225 Difference]: With dead ends: 259 [2022-02-14 15:51:37,876 INFO L226 Difference]: Without dead ends: 209 [2022-02-14 15:51:37,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1717, Invalid=7595, Unknown=0, NotChecked=0, Total=9312 [2022-02-14 15:51:37,876 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 56 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:51:37,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 96 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:51:37,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-02-14 15:51:38,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 153. [2022-02-14 15:51:38,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 121 states have (on average 1.140495867768595) internal successors, (138), 122 states have internal predecessors, (138), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 15:51:38,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 169 transitions. [2022-02-14 15:51:38,265 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 169 transitions. Word has length 121 [2022-02-14 15:51:38,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:51:38,265 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 169 transitions. [2022-02-14 15:51:38,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 65 states have internal predecessors, (108), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 15:51:38,266 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 169 transitions. [2022-02-14 15:51:38,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-02-14 15:51:38,266 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:51:38,266 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:51:38,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-02-14 15:51:38,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:51:38,467 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:51:38,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:51:38,467 INFO L85 PathProgramCache]: Analyzing trace with hash 505621089, now seen corresponding path program 26 times [2022-02-14 15:51:38,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:51:38,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606909872] [2022-02-14 15:51:38,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:51:38,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:51:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:38,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:51:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:38,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:51:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:38,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:51:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:38,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:51:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:38,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:51:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:38,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:51:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:38,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:51:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:38,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-14 15:51:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:38,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-02-14 15:51:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:38,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-14 15:51:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:38,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-14 15:51:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:38,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-02-14 15:51:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:38,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-14 15:51:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:38,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 15:51:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 117 proven. 274 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:38,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:51:38,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606909872] [2022-02-14 15:51:38,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606909872] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:51:38,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230733096] [2022-02-14 15:51:38,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:51:38,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:51:38,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:51:38,627 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:51:38,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-14 15:51:38,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:51:38,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:51:38,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-14 15:51:38,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:51:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 131 proven. 260 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:38,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:51:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 131 proven. 260 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 15:51:39,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230733096] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:51:39,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:51:39,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 23 [2022-02-14 15:51:39,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577701600] [2022-02-14 15:51:39,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:51:39,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-14 15:51:39,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:51:39,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-14 15:51:39,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2022-02-14 15:51:39,042 INFO L87 Difference]: Start difference. First operand 153 states and 169 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 20 states have internal predecessors, (63), 15 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:51:39,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:51:39,842 INFO L93 Difference]: Finished difference Result 166 states and 183 transitions. [2022-02-14 15:51:39,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-14 15:51:39,842 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 20 states have internal predecessors, (63), 15 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 122 [2022-02-14 15:51:39,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:51:39,843 INFO L225 Difference]: With dead ends: 166 [2022-02-14 15:51:39,843 INFO L226 Difference]: Without dead ends: 164 [2022-02-14 15:51:39,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 281 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2022-02-14 15:51:39,843 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 96 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:51:39,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 77 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:51:39,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-14 15:51:40,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2022-02-14 15:51:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:51:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2022-02-14 15:51:40,237 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 122 [2022-02-14 15:51:40,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:51:40,238 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2022-02-14 15:51:40,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 20 states have internal predecessors, (63), 15 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 15:51:40,238 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2022-02-14 15:51:40,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-14 15:51:40,238 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:51:40,238 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:51:40,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-02-14 15:51:40,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-02-14 15:51:40,439 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:51:40,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:51:40,439 INFO L85 PathProgramCache]: Analyzing trace with hash -631204058, now seen corresponding path program 27 times [2022-02-14 15:51:40,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:51:40,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656151059] [2022-02-14 15:51:40,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:51:40,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:51:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:40,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:51:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:40,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:51:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:40,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:51:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:40,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:51:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:40,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:51:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:40,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:51:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:40,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:51:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:40,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-14 15:51:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:40,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-02-14 15:51:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:40,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-14 15:51:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:40,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-14 15:51:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:40,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-02-14 15:51:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:40,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-14 15:51:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:40,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 15:51:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:40,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-02-14 15:51:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 289 proven. 145 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:51:40,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:51:40,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656151059] [2022-02-14 15:51:40,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656151059] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:51:40,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495195126] [2022-02-14 15:51:40,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:51:40,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:51:40,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:51:40,800 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:51:40,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-14 15:51:40,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-02-14 15:51:40,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:51:40,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 15:51:40,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:51:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:51:41,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:51:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:51:41,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495195126] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:51:41,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:51:41,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 56 [2022-02-14 15:51:41,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479845168] [2022-02-14 15:51:41,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:51:41,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-14 15:51:41,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:51:41,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-14 15:51:41,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=613, Invalid=2467, Unknown=0, NotChecked=0, Total=3080 [2022-02-14 15:51:41,798 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 56 states, 56 states have (on average 1.7857142857142858) internal successors, (100), 55 states have internal predecessors, (100), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:51:46,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:51:46,943 INFO L93 Difference]: Finished difference Result 997 states and 1269 transitions. [2022-02-14 15:51:46,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-14 15:51:46,944 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.7857142857142858) internal successors, (100), 55 states have internal predecessors, (100), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-02-14 15:51:46,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:51:46,946 INFO L225 Difference]: With dead ends: 997 [2022-02-14 15:51:46,946 INFO L226 Difference]: Without dead ends: 944 [2022-02-14 15:51:46,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4469 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2416, Invalid=11156, Unknown=0, NotChecked=0, Total=13572 [2022-02-14 15:51:46,947 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 298 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:51:46,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 131 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:51:46,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-02-14 15:51:47,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 161. [2022-02-14 15:51:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.141732283464567) internal successors, (145), 128 states have internal predecessors, (145), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:51:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2022-02-14 15:51:47,385 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 129 [2022-02-14 15:51:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:51:47,385 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2022-02-14 15:51:47,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.7857142857142858) internal successors, (100), 55 states have internal predecessors, (100), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:51:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2022-02-14 15:51:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-14 15:51:47,386 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:51:47,386 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:51:47,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-02-14 15:51:47,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:51:47,586 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:51:47,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:51:47,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1445936379, now seen corresponding path program 79 times [2022-02-14 15:51:47,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:51:47,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093781688] [2022-02-14 15:51:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:51:47,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:51:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:47,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:51:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:47,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:51:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:47,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:51:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:47,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:51:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:47,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:51:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:47,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:51:47,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:47,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:51:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:47,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-14 15:51:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:47,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-02-14 15:51:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:47,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-14 15:51:47,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:47,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-14 15:51:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:47,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-02-14 15:51:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:47,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-14 15:51:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:47,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 15:51:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:47,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-02-14 15:51:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 289 proven. 132 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:51:47,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:51:47,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093781688] [2022-02-14 15:51:47,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093781688] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:51:47,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008365521] [2022-02-14 15:51:47,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:51:47,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:51:47,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:51:47,953 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:51:47,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-14 15:51:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:48,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 15:51:48,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:51:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:51:48,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:51:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:51:49,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008365521] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:51:49,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:51:49,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 57 [2022-02-14 15:51:49,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785180073] [2022-02-14 15:51:49,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:51:49,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-14 15:51:49,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:51:49,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-14 15:51:49,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=2585, Unknown=0, NotChecked=0, Total=3192 [2022-02-14 15:51:49,033 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 57 states, 57 states have (on average 1.7719298245614035) internal successors, (101), 56 states have internal predecessors, (101), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:51:54,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:51:54,325 INFO L93 Difference]: Finished difference Result 952 states and 1208 transitions. [2022-02-14 15:51:54,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-14 15:51:54,325 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.7719298245614035) internal successors, (101), 56 states have internal predecessors, (101), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-02-14 15:51:54,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:51:54,327 INFO L225 Difference]: With dead ends: 952 [2022-02-14 15:51:54,327 INFO L226 Difference]: Without dead ends: 899 [2022-02-14 15:51:54,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5751 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2872, Invalid=13640, Unknown=0, NotChecked=0, Total=16512 [2022-02-14 15:51:54,328 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 286 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:51:54,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 130 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:51:54,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-02-14 15:51:54,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 161. [2022-02-14 15:51:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.141732283464567) internal successors, (145), 128 states have internal predecessors, (145), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:51:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2022-02-14 15:51:54,746 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 129 [2022-02-14 15:51:54,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:51:54,746 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2022-02-14 15:51:54,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.7719298245614035) internal successors, (101), 56 states have internal predecessors, (101), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:51:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2022-02-14 15:51:54,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-14 15:51:54,746 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:51:54,746 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:51:54,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-02-14 15:51:54,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:51:54,947 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:51:54,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:51:54,947 INFO L85 PathProgramCache]: Analyzing trace with hash -932834554, now seen corresponding path program 80 times [2022-02-14 15:51:54,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:51:54,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975652868] [2022-02-14 15:51:54,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:51:54,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:51:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:55,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:51:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:55,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:51:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:55,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:51:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:55,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:51:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:55,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:51:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:55,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:51:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:55,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:51:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:55,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-14 15:51:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:55,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-02-14 15:51:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:55,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-14 15:51:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:55,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-14 15:51:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:55,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-02-14 15:51:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:55,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-14 15:51:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:55,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 15:51:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:55,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-02-14 15:51:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:51:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 289 proven. 121 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:51:55,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:51:55,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975652868] [2022-02-14 15:51:55,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975652868] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:51:55,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205918315] [2022-02-14 15:51:55,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:51:55,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:51:55,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:51:55,302 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:51:55,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-14 15:51:55,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:51:55,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:51:55,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 15:51:55,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:51:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:51:56,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:51:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:51:56,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205918315] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:51:56,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:51:56,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 58 [2022-02-14 15:51:56,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012776301] [2022-02-14 15:51:56,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:51:56,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-14 15:51:56,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:51:56,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-14 15:51:56,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2701, Unknown=0, NotChecked=0, Total=3306 [2022-02-14 15:51:56,353 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 58 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 57 states have internal predecessors, (102), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:52:01,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:52:01,958 INFO L93 Difference]: Finished difference Result 906 states and 1146 transitions. [2022-02-14 15:52:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-14 15:52:01,959 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 57 states have internal predecessors, (102), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-02-14 15:52:01,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:52:01,960 INFO L225 Difference]: With dead ends: 906 [2022-02-14 15:52:01,960 INFO L226 Difference]: Without dead ends: 853 [2022-02-14 15:52:01,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6903 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3320, Invalid=15862, Unknown=0, NotChecked=0, Total=19182 [2022-02-14 15:52:01,961 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 252 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2414 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 2414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-14 15:52:01,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 158 Invalid, 2765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 2414 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-14 15:52:01,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-02-14 15:52:02,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 161. [2022-02-14 15:52:02,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.141732283464567) internal successors, (145), 128 states have internal predecessors, (145), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:52:02,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2022-02-14 15:52:02,377 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 129 [2022-02-14 15:52:02,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:52:02,377 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2022-02-14 15:52:02,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 57 states have internal predecessors, (102), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:52:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2022-02-14 15:52:02,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-14 15:52:02,378 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:52:02,378 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:52:02,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-02-14 15:52:02,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-02-14 15:52:02,578 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:52:02,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:52:02,579 INFO L85 PathProgramCache]: Analyzing trace with hash 2088420133, now seen corresponding path program 81 times [2022-02-14 15:52:02,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:52:02,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035444857] [2022-02-14 15:52:02,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:52:02,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:52:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:02,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:52:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:02,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:52:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:02,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:52:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:02,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:52:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:02,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:52:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:02,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:52:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:02,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:52:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:02,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-14 15:52:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:02,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-02-14 15:52:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:02,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-14 15:52:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:02,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-14 15:52:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:02,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-02-14 15:52:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:02,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-14 15:52:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:02,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 15:52:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:02,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-02-14 15:52:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 289 proven. 112 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:02,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:52:02,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035444857] [2022-02-14 15:52:02,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035444857] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:52:02,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226617396] [2022-02-14 15:52:02,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:52:02,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:52:02,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:52:02,933 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:52:02,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-14 15:52:02,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-02-14 15:52:02,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:52:02,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 15:52:02,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:52:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:03,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:52:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:03,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226617396] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:52:03,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:52:03,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 59 [2022-02-14 15:52:03,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074443785] [2022-02-14 15:52:03,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:52:03,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-14 15:52:03,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:52:03,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-14 15:52:03,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=2815, Unknown=0, NotChecked=0, Total=3422 [2022-02-14 15:52:03,983 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:52:09,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:52:09,349 INFO L93 Difference]: Finished difference Result 859 states and 1083 transitions. [2022-02-14 15:52:09,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-14 15:52:09,349 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-02-14 15:52:09,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:52:09,350 INFO L225 Difference]: With dead ends: 859 [2022-02-14 15:52:09,351 INFO L226 Difference]: Without dead ends: 806 [2022-02-14 15:52:09,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7827 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3714, Invalid=17748, Unknown=0, NotChecked=0, Total=21462 [2022-02-14 15:52:09,352 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 232 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:52:09,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 117 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:52:09,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-02-14 15:52:09,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 161. [2022-02-14 15:52:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.141732283464567) internal successors, (145), 128 states have internal predecessors, (145), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:52:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2022-02-14 15:52:09,774 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 129 [2022-02-14 15:52:09,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:52:09,774 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2022-02-14 15:52:09,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:52:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2022-02-14 15:52:09,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-14 15:52:09,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:52:09,775 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:52:09,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-02-14 15:52:09,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:52:09,975 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:52:09,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:52:09,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1258034918, now seen corresponding path program 82 times [2022-02-14 15:52:09,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:52:09,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395823947] [2022-02-14 15:52:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:52:09,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:52:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:10,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:52:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:10,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:52:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:10,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:52:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:10,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:52:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:10,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:52:10,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:10,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:52:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:10,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:52:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:10,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-14 15:52:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:10,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-02-14 15:52:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:10,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-14 15:52:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:10,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-14 15:52:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:10,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-02-14 15:52:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:10,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-14 15:52:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:10,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 15:52:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:10,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-02-14 15:52:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:10,332 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 289 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:10,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:52:10,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395823947] [2022-02-14 15:52:10,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395823947] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:52:10,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736680498] [2022-02-14 15:52:10,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:52:10,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:52:10,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:52:10,333 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:52:10,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-14 15:52:10,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:52:10,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:52:10,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 15:52:10,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:52:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:11,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:52:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:11,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736680498] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:52:11,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:52:11,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 60 [2022-02-14 15:52:11,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451049909] [2022-02-14 15:52:11,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:52:11,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-14 15:52:11,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:52:11,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-14 15:52:11,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=613, Invalid=2927, Unknown=0, NotChecked=0, Total=3540 [2022-02-14 15:52:11,407 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 60 states, 60 states have (on average 1.7333333333333334) internal successors, (104), 59 states have internal predecessors, (104), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:52:16,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:52:16,921 INFO L93 Difference]: Finished difference Result 811 states and 1019 transitions. [2022-02-14 15:52:16,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-14 15:52:16,921 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.7333333333333334) internal successors, (104), 59 states have internal predecessors, (104), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-02-14 15:52:16,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:52:16,923 INFO L225 Difference]: With dead ends: 811 [2022-02-14 15:52:16,923 INFO L226 Difference]: Without dead ends: 758 [2022-02-14 15:52:16,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8524 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4030, Invalid=19226, Unknown=0, NotChecked=0, Total=23256 [2022-02-14 15:52:16,924 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 223 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:52:16,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 132 Invalid, 1970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 1594 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:52:16,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-02-14 15:52:17,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 161. [2022-02-14 15:52:17,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.141732283464567) internal successors, (145), 128 states have internal predecessors, (145), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:52:17,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2022-02-14 15:52:17,351 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 129 [2022-02-14 15:52:17,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:52:17,351 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2022-02-14 15:52:17,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.7333333333333334) internal successors, (104), 59 states have internal predecessors, (104), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:52:17,351 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2022-02-14 15:52:17,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-14 15:52:17,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:52:17,351 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:52:17,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-02-14 15:52:17,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-02-14 15:52:17,552 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:52:17,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:52:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1285897029, now seen corresponding path program 83 times [2022-02-14 15:52:17,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:52:17,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697994146] [2022-02-14 15:52:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:52:17,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:52:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:17,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:52:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:17,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:52:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:17,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:52:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:17,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:52:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:17,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:52:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:17,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:52:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:17,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:52:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:17,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-14 15:52:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:17,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-02-14 15:52:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:17,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-14 15:52:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:17,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-14 15:52:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:17,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-02-14 15:52:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:17,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-14 15:52:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:17,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 15:52:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:17,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-02-14 15:52:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 289 proven. 100 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:17,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:52:17,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697994146] [2022-02-14 15:52:17,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697994146] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:52:17,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598847549] [2022-02-14 15:52:17,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:52:17,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:52:17,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:52:17,914 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:52:17,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-14 15:52:17,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-02-14 15:52:17,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:52:17,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 15:52:17,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:52:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:18,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:52:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:19,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598847549] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:52:19,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:52:19,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 61 [2022-02-14 15:52:19,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984128499] [2022-02-14 15:52:19,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:52:19,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-14 15:52:19,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:52:19,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-14 15:52:19,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3037, Unknown=0, NotChecked=0, Total=3660 [2022-02-14 15:52:19,022 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 61 states, 61 states have (on average 1.721311475409836) internal successors, (105), 60 states have internal predecessors, (105), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:52:24,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:52:24,540 INFO L93 Difference]: Finished difference Result 762 states and 954 transitions. [2022-02-14 15:52:24,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-14 15:52:24,541 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.721311475409836) internal successors, (105), 60 states have internal predecessors, (105), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-02-14 15:52:24,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:52:24,542 INFO L225 Difference]: With dead ends: 762 [2022-02-14 15:52:24,542 INFO L226 Difference]: Without dead ends: 709 [2022-02-14 15:52:24,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8975 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4250, Invalid=20242, Unknown=0, NotChecked=0, Total=24492 [2022-02-14 15:52:24,543 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 224 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 15:52:24,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 135 Invalid, 2123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 15:52:24,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-02-14 15:52:24,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 161. [2022-02-14 15:52:24,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.141732283464567) internal successors, (145), 128 states have internal predecessors, (145), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:52:24,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2022-02-14 15:52:24,978 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 129 [2022-02-14 15:52:24,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:52:24,978 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2022-02-14 15:52:24,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.721311475409836) internal successors, (105), 60 states have internal predecessors, (105), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:52:24,978 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2022-02-14 15:52:24,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-14 15:52:24,979 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:52:24,979 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:52:24,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-02-14 15:52:25,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-02-14 15:52:25,179 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:52:25,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:52:25,180 INFO L85 PathProgramCache]: Analyzing trace with hash -2145344826, now seen corresponding path program 84 times [2022-02-14 15:52:25,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:52:25,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638335074] [2022-02-14 15:52:25,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:52:25,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:52:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:25,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:52:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:25,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:52:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:25,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:52:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:25,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:52:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:25,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:52:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:25,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:52:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:25,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:52:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:25,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-14 15:52:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:25,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-02-14 15:52:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:25,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-14 15:52:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:25,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-14 15:52:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:25,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-02-14 15:52:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:25,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-14 15:52:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:25,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 15:52:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:25,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-02-14 15:52:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 289 proven. 97 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:25,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:52:25,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638335074] [2022-02-14 15:52:25,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638335074] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:52:25,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235456061] [2022-02-14 15:52:25,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:52:25,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:52:25,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:52:25,542 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:52:25,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-14 15:52:25,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-02-14 15:52:25,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:52:25,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 15:52:25,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:52:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:26,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:52:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:26,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235456061] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:52:26,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:52:26,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 62 [2022-02-14 15:52:26,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595916885] [2022-02-14 15:52:26,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:52:26,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-14 15:52:26,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:52:26,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-14 15:52:26,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=3145, Unknown=0, NotChecked=0, Total=3782 [2022-02-14 15:52:26,669 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 62 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 61 states have internal predecessors, (106), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:52:31,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:52:31,930 INFO L93 Difference]: Finished difference Result 712 states and 888 transitions. [2022-02-14 15:52:31,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-14 15:52:31,930 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 61 states have internal predecessors, (106), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-02-14 15:52:31,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:52:31,931 INFO L225 Difference]: With dead ends: 712 [2022-02-14 15:52:31,931 INFO L226 Difference]: Without dead ends: 659 [2022-02-14 15:52:31,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9173 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4362, Invalid=20760, Unknown=0, NotChecked=0, Total=25122 [2022-02-14 15:52:31,932 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 173 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:52:31,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 117 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:52:31,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-02-14 15:52:32,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 161. [2022-02-14 15:52:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.141732283464567) internal successors, (145), 128 states have internal predecessors, (145), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:52:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2022-02-14 15:52:32,364 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 129 [2022-02-14 15:52:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:52:32,364 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2022-02-14 15:52:32,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 61 states have internal predecessors, (106), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:52:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2022-02-14 15:52:32,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-14 15:52:32,365 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:52:32,365 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:52:32,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-02-14 15:52:32,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-02-14 15:52:32,566 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:52:32,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:52:32,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1139659931, now seen corresponding path program 85 times [2022-02-14 15:52:32,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:52:32,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817956011] [2022-02-14 15:52:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:52:32,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:52:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:32,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:52:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:32,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:52:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:32,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:52:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:32,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:52:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:32,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:52:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:32,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:52:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:32,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:52:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:32,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-14 15:52:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:32,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-02-14 15:52:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:32,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-14 15:52:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:32,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-14 15:52:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:32,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-02-14 15:52:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:32,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-14 15:52:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:32,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 15:52:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:32,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-02-14 15:52:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 289 proven. 96 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:32,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:52:32,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817956011] [2022-02-14 15:52:32,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817956011] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:52:32,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526873530] [2022-02-14 15:52:32,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:52:32,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:52:32,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:52:32,930 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:52:32,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-14 15:52:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:32,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 15:52:32,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:52:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 329 proven. 56 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:33,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:52:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 329 proven. 56 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:34,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526873530] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:52:34,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:52:34,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 63 [2022-02-14 15:52:34,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661056951] [2022-02-14 15:52:34,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:52:34,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-14 15:52:34,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:52:34,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-14 15:52:34,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=655, Invalid=3251, Unknown=0, NotChecked=0, Total=3906 [2022-02-14 15:52:34,066 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 63 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 62 states have internal predecessors, (107), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:52:39,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:52:39,188 INFO L93 Difference]: Finished difference Result 661 states and 821 transitions. [2022-02-14 15:52:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-14 15:52:39,188 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 62 states have internal predecessors, (107), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-02-14 15:52:39,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:52:39,190 INFO L225 Difference]: With dead ends: 661 [2022-02-14 15:52:39,190 INFO L226 Difference]: Without dead ends: 608 [2022-02-14 15:52:39,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9122 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4360, Invalid=20762, Unknown=0, NotChecked=0, Total=25122 [2022-02-14 15:52:39,191 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 173 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:52:39,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 119 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:52:39,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-02-14 15:52:39,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 161. [2022-02-14 15:52:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.141732283464567) internal successors, (145), 128 states have internal predecessors, (145), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:52:39,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2022-02-14 15:52:39,637 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 129 [2022-02-14 15:52:39,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:52:39,637 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2022-02-14 15:52:39,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 62 states have internal predecessors, (107), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:52:39,637 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2022-02-14 15:52:39,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-14 15:52:39,638 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:52:39,638 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:52:39,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-02-14 15:52:39,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:52:39,839 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:52:39,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:52:39,839 INFO L85 PathProgramCache]: Analyzing trace with hash -28199258, now seen corresponding path program 86 times [2022-02-14 15:52:39,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:52:39,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679489577] [2022-02-14 15:52:39,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:52:39,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:52:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:40,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:52:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:40,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:52:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:40,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:52:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:40,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:52:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:40,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:52:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:40,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:52:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:40,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:52:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:40,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-14 15:52:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:40,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-02-14 15:52:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:40,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-14 15:52:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:40,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-14 15:52:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:40,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-02-14 15:52:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:40,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-14 15:52:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:40,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 15:52:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:40,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-02-14 15:52:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 289 proven. 97 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:40,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:52:40,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679489577] [2022-02-14 15:52:40,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679489577] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:52:40,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895584636] [2022-02-14 15:52:40,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:52:40,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:52:40,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:52:40,197 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:52:40,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-02-14 15:52:40,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:52:40,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:52:40,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 15:52:40,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:52:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:41,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:52:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:41,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895584636] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:52:41,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:52:41,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 64 [2022-02-14 15:52:41,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301818085] [2022-02-14 15:52:41,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:52:41,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-14 15:52:41,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:52:41,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-14 15:52:41,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=3355, Unknown=0, NotChecked=0, Total=4032 [2022-02-14 15:52:41,323 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 64 states, 64 states have (on average 1.6875) internal successors, (108), 63 states have internal predecessors, (108), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:52:46,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:52:46,289 INFO L93 Difference]: Finished difference Result 609 states and 753 transitions. [2022-02-14 15:52:46,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-14 15:52:46,290 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.6875) internal successors, (108), 63 states have internal predecessors, (108), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-02-14 15:52:46,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:52:46,291 INFO L225 Difference]: With dead ends: 609 [2022-02-14 15:52:46,291 INFO L226 Difference]: Without dead ends: 556 [2022-02-14 15:52:46,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8828 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4244, Invalid=20248, Unknown=0, NotChecked=0, Total=24492 [2022-02-14 15:52:46,292 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 164 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:52:46,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 131 Invalid, 1922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:52:46,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-02-14 15:52:46,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 161. [2022-02-14 15:52:46,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.141732283464567) internal successors, (145), 128 states have internal predecessors, (145), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:52:46,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2022-02-14 15:52:46,744 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 129 [2022-02-14 15:52:46,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:52:46,744 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2022-02-14 15:52:46,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.6875) internal successors, (108), 63 states have internal predecessors, (108), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:52:46,745 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2022-02-14 15:52:46,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-14 15:52:46,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:52:46,745 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:52:46,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-02-14 15:52:46,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:52:46,946 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:52:46,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:52:46,946 INFO L85 PathProgramCache]: Analyzing trace with hash 67343237, now seen corresponding path program 87 times [2022-02-14 15:52:46,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:52:46,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638904571] [2022-02-14 15:52:46,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:52:46,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:52:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:47,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:52:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:47,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:52:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:47,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:52:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:47,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:52:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:47,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:52:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:47,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:52:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:47,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:52:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:47,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-14 15:52:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:47,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-02-14 15:52:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:47,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-14 15:52:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:47,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-14 15:52:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:47,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-02-14 15:52:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:47,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-14 15:52:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:47,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 15:52:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:47,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-02-14 15:52:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 289 proven. 100 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:47,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:52:47,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638904571] [2022-02-14 15:52:47,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638904571] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:52:47,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185395874] [2022-02-14 15:52:47,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:52:47,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:52:47,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:52:47,300 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:52:47,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-02-14 15:52:47,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-02-14 15:52:47,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:52:47,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 15:52:47,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:52:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:48,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:52:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:48,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185395874] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:52:48,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:52:48,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 65 [2022-02-14 15:52:48,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727178958] [2022-02-14 15:52:48,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:52:48,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-14 15:52:48,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:52:48,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-14 15:52:48,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=3457, Unknown=0, NotChecked=0, Total=4160 [2022-02-14 15:52:48,451 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 65 states, 65 states have (on average 1.676923076923077) internal successors, (109), 64 states have internal predecessors, (109), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:52:53,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:52:53,053 INFO L93 Difference]: Finished difference Result 556 states and 684 transitions. [2022-02-14 15:52:53,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-14 15:52:53,053 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.676923076923077) internal successors, (109), 64 states have internal predecessors, (109), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-02-14 15:52:53,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:52:53,054 INFO L225 Difference]: With dead ends: 556 [2022-02-14 15:52:53,054 INFO L226 Difference]: Without dead ends: 503 [2022-02-14 15:52:53,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8304 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4020, Invalid=19236, Unknown=0, NotChecked=0, Total=23256 [2022-02-14 15:52:53,055 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 155 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:52:53,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 99 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:52:53,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-02-14 15:52:53,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 161. [2022-02-14 15:52:53,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.141732283464567) internal successors, (145), 128 states have internal predecessors, (145), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:52:53,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2022-02-14 15:52:53,503 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 129 [2022-02-14 15:52:53,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:52:53,504 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2022-02-14 15:52:53,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.676923076923077) internal successors, (109), 64 states have internal predecessors, (109), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:52:53,504 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2022-02-14 15:52:53,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-14 15:52:53,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:52:53,504 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:52:53,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-02-14 15:52:53,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-02-14 15:52:53,716 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:52:53,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:52:53,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1265806714, now seen corresponding path program 88 times [2022-02-14 15:52:53,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:52:53,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479999594] [2022-02-14 15:52:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:52:53,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:52:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:54,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:52:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:54,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:52:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:54,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:52:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:54,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:52:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:54,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:52:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:54,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:52:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:54,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:52:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:54,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-14 15:52:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:54,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-02-14 15:52:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:54,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-14 15:52:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:54,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-14 15:52:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:54,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-02-14 15:52:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:54,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-14 15:52:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:54,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 15:52:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:54,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-02-14 15:52:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:52:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 289 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:54,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:52:54,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479999594] [2022-02-14 15:52:54,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479999594] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:52:54,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074865552] [2022-02-14 15:52:54,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:52:54,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:52:54,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:52:54,073 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:52:54,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-02-14 15:52:54,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:52:54,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:52:54,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 15:52:54,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:52:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:55,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:52:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:52:55,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074865552] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:52:55,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:52:55,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 66 [2022-02-14 15:52:55,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329350220] [2022-02-14 15:52:55,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:52:55,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-14 15:52:55,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:52:55,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-14 15:52:55,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=3557, Unknown=0, NotChecked=0, Total=4290 [2022-02-14 15:52:55,242 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 66 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 65 states have internal predecessors, (110), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:52:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:52:59,433 INFO L93 Difference]: Finished difference Result 502 states and 614 transitions. [2022-02-14 15:52:59,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-14 15:52:59,433 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 65 states have internal predecessors, (110), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-02-14 15:52:59,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:52:59,434 INFO L225 Difference]: With dead ends: 502 [2022-02-14 15:52:59,435 INFO L226 Difference]: Without dead ends: 449 [2022-02-14 15:52:59,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7575 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3700, Invalid=17762, Unknown=0, NotChecked=0, Total=21462 [2022-02-14 15:52:59,436 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 130 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:52:59,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 100 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:52:59,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-02-14 15:52:59,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 161. [2022-02-14 15:52:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.141732283464567) internal successors, (145), 128 states have internal predecessors, (145), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:52:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2022-02-14 15:52:59,894 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 129 [2022-02-14 15:52:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:52:59,894 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2022-02-14 15:52:59,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 65 states have internal predecessors, (110), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:52:59,894 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2022-02-14 15:52:59,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-14 15:52:59,894 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:52:59,895 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:52:59,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-02-14 15:53:00,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable130 [2022-02-14 15:53:00,095 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:53:00,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:53:00,095 INFO L85 PathProgramCache]: Analyzing trace with hash 356217765, now seen corresponding path program 89 times [2022-02-14 15:53:00,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:53:00,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930791471] [2022-02-14 15:53:00,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:53:00,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:53:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:00,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:53:00,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:00,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:53:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:00,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:53:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:00,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:53:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:00,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:53:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:00,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:53:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:00,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:53:00,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:00,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-14 15:53:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:00,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-02-14 15:53:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:00,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-14 15:53:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:00,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-14 15:53:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:00,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-02-14 15:53:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:00,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-14 15:53:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:00,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 15:53:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:00,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-02-14 15:53:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 289 proven. 112 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:53:00,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:53:00,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930791471] [2022-02-14 15:53:00,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930791471] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:53:00,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408693943] [2022-02-14 15:53:00,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:53:00,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:53:00,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:53:00,456 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:53:00,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-02-14 15:53:00,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-02-14 15:53:00,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:53:00,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 15:53:00,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:53:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:53:01,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:53:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:53:01,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408693943] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:53:01,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:53:01,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 67 [2022-02-14 15:53:01,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619270245] [2022-02-14 15:53:01,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:53:01,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-14 15:53:01,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:53:01,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-14 15:53:01,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=767, Invalid=3655, Unknown=0, NotChecked=0, Total=4422 [2022-02-14 15:53:01,650 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 67 states, 67 states have (on average 1.6567164179104477) internal successors, (111), 66 states have internal predecessors, (111), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:53:05,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:53:05,341 INFO L93 Difference]: Finished difference Result 447 states and 543 transitions. [2022-02-14 15:53:05,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-14 15:53:05,341 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.6567164179104477) internal successors, (111), 66 states have internal predecessors, (111), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-02-14 15:53:05,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:53:05,342 INFO L225 Difference]: With dead ends: 447 [2022-02-14 15:53:05,342 INFO L226 Difference]: Without dead ends: 394 [2022-02-14 15:53:05,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6678 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3302, Invalid=15880, Unknown=0, NotChecked=0, Total=19182 [2022-02-14 15:53:05,344 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 108 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:53:05,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 106 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:53:05,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-02-14 15:53:05,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 161. [2022-02-14 15:53:05,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.141732283464567) internal successors, (145), 128 states have internal predecessors, (145), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:53:05,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2022-02-14 15:53:05,835 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 129 [2022-02-14 15:53:05,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:53:05,835 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2022-02-14 15:53:05,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.6567164179104477) internal successors, (111), 66 states have internal predecessors, (111), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:53:05,835 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2022-02-14 15:53:05,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-14 15:53:05,835 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:53:05,835 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:53:05,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-02-14 15:53:06,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:53:06,036 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:53:06,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:53:06,036 INFO L85 PathProgramCache]: Analyzing trace with hash -900630938, now seen corresponding path program 90 times [2022-02-14 15:53:06,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:53:06,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11264877] [2022-02-14 15:53:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:53:06,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:53:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:06,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:53:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:06,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:53:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:06,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:53:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:06,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:53:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:06,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:53:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:06,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:53:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:06,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:53:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:06,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-14 15:53:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:06,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-02-14 15:53:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:06,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-14 15:53:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:06,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-14 15:53:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:06,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-02-14 15:53:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:06,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-14 15:53:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:06,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 15:53:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:06,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-02-14 15:53:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 289 proven. 121 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:53:06,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:53:06,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11264877] [2022-02-14 15:53:06,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11264877] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:53:06,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803272253] [2022-02-14 15:53:06,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:53:06,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:53:06,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:53:06,402 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:53:06,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-02-14 15:53:06,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-02-14 15:53:06,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:53:06,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 15:53:06,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:53:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:53:07,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:53:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:53:07,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803272253] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:53:07,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:53:07,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 68 [2022-02-14 15:53:07,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221175614] [2022-02-14 15:53:07,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:53:07,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-14 15:53:07,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:53:07,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-14 15:53:07,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=3751, Unknown=0, NotChecked=0, Total=4556 [2022-02-14 15:53:07,621 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 68 states, 68 states have (on average 1.6470588235294117) internal successors, (112), 67 states have internal predecessors, (112), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:53:10,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:53:10,868 INFO L93 Difference]: Finished difference Result 391 states and 471 transitions. [2022-02-14 15:53:10,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-14 15:53:10,869 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.6470588235294117) internal successors, (112), 67 states have internal predecessors, (112), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-02-14 15:53:10,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:53:10,870 INFO L225 Difference]: With dead ends: 391 [2022-02-14 15:53:10,870 INFO L226 Difference]: Without dead ends: 338 [2022-02-14 15:53:10,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5662 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2850, Invalid=13662, Unknown=0, NotChecked=0, Total=16512 [2022-02-14 15:53:10,871 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 94 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:53:10,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 123 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:53:10,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-14 15:53:11,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 161. [2022-02-14 15:53:11,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.141732283464567) internal successors, (145), 128 states have internal predecessors, (145), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:53:11,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2022-02-14 15:53:11,427 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 129 [2022-02-14 15:53:11,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:53:11,427 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2022-02-14 15:53:11,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.6470588235294117) internal successors, (112), 67 states have internal predecessors, (112), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:53:11,428 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2022-02-14 15:53:11,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-14 15:53:11,428 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:53:11,428 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:53:11,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-02-14 15:53:11,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:53:11,628 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:53:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:53:11,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1208235067, now seen corresponding path program 91 times [2022-02-14 15:53:11,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:53:11,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895695590] [2022-02-14 15:53:11,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:53:11,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:53:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:11,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:53:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:11,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:53:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:11,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:53:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:11,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:53:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:11,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:53:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:11,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:53:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:11,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:53:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:11,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-14 15:53:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:11,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-02-14 15:53:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:11,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-14 15:53:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:11,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-14 15:53:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:11,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-02-14 15:53:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:11,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-14 15:53:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:11,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 15:53:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:11,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-02-14 15:53:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 289 proven. 132 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:53:11,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:53:11,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895695590] [2022-02-14 15:53:11,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895695590] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:53:11,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125567744] [2022-02-14 15:53:11,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:53:11,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:53:11,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:53:11,998 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:53:11,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-02-14 15:53:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:12,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 15:53:12,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:53:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:53:12,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:53:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:53:13,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125567744] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:53:13,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:53:13,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 69 [2022-02-14 15:53:13,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287098556] [2022-02-14 15:53:13,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:53:13,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-14 15:53:13,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:53:13,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-14 15:53:13,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=847, Invalid=3845, Unknown=0, NotChecked=0, Total=4692 [2022-02-14 15:53:13,218 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 69 states, 69 states have (on average 1.6376811594202898) internal successors, (113), 68 states have internal predecessors, (113), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:53:15,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:53:15,909 INFO L93 Difference]: Finished difference Result 334 states and 398 transitions. [2022-02-14 15:53:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-14 15:53:15,910 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.6376811594202898) internal successors, (113), 68 states have internal predecessors, (113), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-02-14 15:53:15,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:53:15,910 INFO L225 Difference]: With dead ends: 334 [2022-02-14 15:53:15,910 INFO L226 Difference]: Without dead ends: 281 [2022-02-14 15:53:15,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4572 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2374, Invalid=11198, Unknown=0, NotChecked=0, Total=13572 [2022-02-14 15:53:15,911 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 71 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:53:15,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 115 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:53:15,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-02-14 15:53:16,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 161. [2022-02-14 15:53:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.141732283464567) internal successors, (145), 128 states have internal predecessors, (145), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:53:16,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2022-02-14 15:53:16,409 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 129 [2022-02-14 15:53:16,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:53:16,409 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2022-02-14 15:53:16,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.6376811594202898) internal successors, (113), 68 states have internal predecessors, (113), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:53:16,409 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2022-02-14 15:53:16,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-14 15:53:16,409 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:53:16,410 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:53:16,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-02-14 15:53:16,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-02-14 15:53:16,610 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:53:16,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:53:16,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2140938822, now seen corresponding path program 14 times [2022-02-14 15:53:16,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:53:16,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566073503] [2022-02-14 15:53:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:53:16,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:53:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:16,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:53:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:16,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 15:53:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:16,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-14 15:53:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:16,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:53:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:16,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 15:53:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:16,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:53:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:16,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 15:53:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:16,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-14 15:53:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:16,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-02-14 15:53:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:16,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-14 15:53:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:16,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-14 15:53:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:16,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-02-14 15:53:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:16,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-14 15:53:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:16,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 15:53:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:16,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-02-14 15:53:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 289 proven. 145 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:53:16,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:53:16,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566073503] [2022-02-14 15:53:16,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566073503] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:53:16,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915679456] [2022-02-14 15:53:16,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:53:16,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:53:16,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:53:16,986 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:53:16,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-02-14 15:53:17,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:53:17,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:53:17,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 15:53:17,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:53:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:53:18,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:53:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:53:18,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915679456] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:53:18,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:53:18,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-02-14 15:53:18,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063712400] [2022-02-14 15:53:18,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:53:18,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-14 15:53:18,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:53:18,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-14 15:53:18,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=3937, Unknown=0, NotChecked=0, Total=4830 [2022-02-14 15:53:18,232 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 70 states, 70 states have (on average 1.6285714285714286) internal successors, (114), 69 states have internal predecessors, (114), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:53:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:53:20,134 INFO L93 Difference]: Finished difference Result 276 states and 324 transitions. [2022-02-14 15:53:20,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-14 15:53:20,135 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.6285714285714286) internal successors, (114), 69 states have internal predecessors, (114), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-02-14 15:53:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:53:20,135 INFO L225 Difference]: With dead ends: 276 [2022-02-14 15:53:20,135 INFO L226 Difference]: Without dead ends: 223 [2022-02-14 15:53:20,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3498 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1926, Invalid=8580, Unknown=0, NotChecked=0, Total=10506 [2022-02-14 15:53:20,136 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 50 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:53:20,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 87 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:53:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-02-14 15:53:20,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2022-02-14 15:53:20,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 129 states have (on average 1.1395348837209303) internal successors, (147), 130 states have internal predecessors, (147), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:53:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 180 transitions. [2022-02-14 15:53:20,669 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 180 transitions. Word has length 129 [2022-02-14 15:53:20,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:53:20,669 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 180 transitions. [2022-02-14 15:53:20,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.6285714285714286) internal successors, (114), 69 states have internal predecessors, (114), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 15:53:20,670 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 180 transitions. [2022-02-14 15:53:20,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-02-14 15:53:20,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:53:20,670 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:53:20,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-02-14 15:53:20,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-02-14 15:53:20,870 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:53:20,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:53:20,871 INFO L85 PathProgramCache]: Analyzing trace with hash 622287396, now seen corresponding path program 28 times [2022-02-14 15:53:20,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:53:20,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562893677] [2022-02-14 15:53:20,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:53:20,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:53:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:21,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:53:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:21,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:53:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:21,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:53:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:21,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:53:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:21,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:53:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:21,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:53:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:21,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:53:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:21,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:53:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:21,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-14 15:53:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:21,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-14 15:53:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:21,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 15:53:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:21,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-14 15:53:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:21,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-14 15:53:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:21,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-14 15:53:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:21,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 15:53:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 133 proven. 316 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:53:21,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:53:21,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562893677] [2022-02-14 15:53:21,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562893677] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:53:21,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527969650] [2022-02-14 15:53:21,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:53:21,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:53:21,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:53:21,046 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:53:21,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-02-14 15:53:21,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:53:21,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:53:21,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-14 15:53:21,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:53:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 148 proven. 301 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:53:21,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:53:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 148 proven. 301 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-02-14 15:53:21,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527969650] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:53:21,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:53:21,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 24 [2022-02-14 15:53:21,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929378997] [2022-02-14 15:53:21,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:53:21,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-14 15:53:21,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:53:21,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-14 15:53:21,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2022-02-14 15:53:21,472 INFO L87 Difference]: Start difference. First operand 163 states and 180 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 21 states have internal predecessors, (66), 16 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 15:53:22,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:53:22,475 INFO L93 Difference]: Finished difference Result 176 states and 194 transitions. [2022-02-14 15:53:22,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-14 15:53:22,475 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 21 states have internal predecessors, (66), 16 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 130 [2022-02-14 15:53:22,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:53:22,476 INFO L225 Difference]: With dead ends: 176 [2022-02-14 15:53:22,476 INFO L226 Difference]: Without dead ends: 174 [2022-02-14 15:53:22,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 300 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=1396, Unknown=0, NotChecked=0, Total=1892 [2022-02-14 15:53:22,476 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 93 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:53:22,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 94 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:53:22,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-02-14 15:53:23,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2022-02-14 15:53:23,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 135 states have internal predecessors, (152), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:53:23,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2022-02-14 15:53:23,016 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 130 [2022-02-14 15:53:23,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:53:23,016 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2022-02-14 15:53:23,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 21 states have internal predecessors, (66), 16 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 15:53:23,017 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2022-02-14 15:53:23,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-14 15:53:23,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:53:23,017 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:53:23,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-02-14 15:53:23,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-02-14 15:53:23,217 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:53:23,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:53:23,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1353627139, now seen corresponding path program 29 times [2022-02-14 15:53:23,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:53:23,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751449832] [2022-02-14 15:53:23,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:53:23,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:53:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:23,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:53:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:23,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:53:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:23,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:53:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:23,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:53:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:23,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:53:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:23,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:53:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:23,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:53:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:23,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:53:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:23,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-14 15:53:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:23,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-14 15:53:23,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:23,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 15:53:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:23,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-14 15:53:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:23,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-14 15:53:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:23,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-14 15:53:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:23,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 15:53:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:23,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-02-14 15:53:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 332 proven. 163 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:53:23,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:53:23,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751449832] [2022-02-14 15:53:23,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751449832] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:53:23,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625882684] [2022-02-14 15:53:23,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:53:23,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:53:23,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:53:23,625 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:53:23,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-02-14 15:53:23,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-02-14 15:53:23,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:53:23,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 15:53:23,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:53:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 375 proven. 120 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:53:24,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:53:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 375 proven. 120 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:53:24,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625882684] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:53:24,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:53:24,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 59 [2022-02-14 15:53:24,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468980113] [2022-02-14 15:53:24,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:53:24,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-14 15:53:24,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:53:24,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-14 15:53:24,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=2738, Unknown=0, NotChecked=0, Total=3422 [2022-02-14 15:53:24,723 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 59 states, 59 states have (on average 1.7796610169491525) internal successors, (105), 58 states have internal predecessors, (105), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:53:31,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:53:31,428 INFO L93 Difference]: Finished difference Result 1118 states and 1424 transitions. [2022-02-14 15:53:31,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-14 15:53:31,429 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.7796610169491525) internal successors, (105), 58 states have internal predecessors, (105), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-02-14 15:53:31,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:53:31,431 INFO L225 Difference]: With dead ends: 1118 [2022-02-14 15:53:31,431 INFO L226 Difference]: Without dead ends: 1062 [2022-02-14 15:53:31,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5063 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2702, Invalid=12550, Unknown=0, NotChecked=0, Total=15252 [2022-02-14 15:53:31,432 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 306 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:53:31,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 131 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:53:31,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-02-14 15:53:32,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 171. [2022-02-14 15:53:32,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 136 states have internal predecessors, (154), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:53:32,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-02-14 15:53:32,045 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 137 [2022-02-14 15:53:32,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:53:32,045 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-02-14 15:53:32,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.7796610169491525) internal successors, (105), 58 states have internal predecessors, (105), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:53:32,045 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-02-14 15:53:32,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-14 15:53:32,046 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:53:32,046 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:53:32,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-02-14 15:53:32,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-02-14 15:53:32,246 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:53:32,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:53:32,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1829879484, now seen corresponding path program 92 times [2022-02-14 15:53:32,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:53:32,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100263783] [2022-02-14 15:53:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:53:32,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:53:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:32,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:53:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:32,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:53:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:32,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:53:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:32,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:53:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:32,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:53:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:32,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:53:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:32,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:53:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:32,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:53:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:32,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-14 15:53:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:32,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-14 15:53:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:32,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 15:53:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:32,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-14 15:53:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:32,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-14 15:53:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:32,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-14 15:53:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:32,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 15:53:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:32,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-02-14 15:53:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 332 proven. 149 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:53:32,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:53:32,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100263783] [2022-02-14 15:53:32,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100263783] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:53:32,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925028919] [2022-02-14 15:53:32,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:53:32,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:53:32,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:53:32,662 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:53:32,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-02-14 15:53:32,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:53:32,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:53:32,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 15:53:32,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:53:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 375 proven. 106 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:53:33,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:53:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 375 proven. 106 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:53:33,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925028919] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:53:33,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:53:33,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 60 [2022-02-14 15:53:33,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419800234] [2022-02-14 15:53:33,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:53:33,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-14 15:53:33,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:53:33,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-14 15:53:33,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=2863, Unknown=0, NotChecked=0, Total=3540 [2022-02-14 15:53:33,757 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 60 states, 60 states have (on average 1.7666666666666666) internal successors, (106), 59 states have internal predecessors, (106), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:53:40,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:53:40,623 INFO L93 Difference]: Finished difference Result 1070 states and 1359 transitions. [2022-02-14 15:53:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-14 15:53:40,624 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.7666666666666666) internal successors, (106), 59 states have internal predecessors, (106), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-02-14 15:53:40,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:53:40,626 INFO L225 Difference]: With dead ends: 1070 [2022-02-14 15:53:40,626 INFO L226 Difference]: Without dead ends: 1014 [2022-02-14 15:53:40,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6549 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3229, Invalid=15403, Unknown=0, NotChecked=0, Total=18632 [2022-02-14 15:53:40,627 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 334 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:53:40,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 128 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 1536 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:53:40,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-02-14 15:53:41,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 171. [2022-02-14 15:53:41,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 136 states have internal predecessors, (154), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:53:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-02-14 15:53:41,239 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 137 [2022-02-14 15:53:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:53:41,239 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-02-14 15:53:41,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.7666666666666666) internal successors, (106), 59 states have internal predecessors, (106), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:53:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-02-14 15:53:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-14 15:53:41,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:53:41,240 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:53:41,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-02-14 15:53:41,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:53:41,440 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:53:41,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:53:41,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1734336989, now seen corresponding path program 93 times [2022-02-14 15:53:41,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:53:41,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209688664] [2022-02-14 15:53:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:53:41,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:53:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:41,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:53:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:41,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:53:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:41,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:53:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:41,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:53:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:41,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:53:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:41,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:53:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:41,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:53:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:41,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:53:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:41,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-14 15:53:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:41,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-14 15:53:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:41,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 15:53:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:41,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-14 15:53:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:41,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-14 15:53:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:41,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-14 15:53:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:41,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 15:53:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:41,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-02-14 15:53:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 332 proven. 137 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:53:41,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:53:41,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209688664] [2022-02-14 15:53:41,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209688664] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:53:41,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514079535] [2022-02-14 15:53:41,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:53:41,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:53:41,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:53:41,840 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:53:41,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-02-14 15:53:41,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-02-14 15:53:41,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:53:41,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 15:53:41,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:53:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 375 proven. 94 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:53:42,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:53:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 375 proven. 94 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:53:42,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514079535] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:53:42,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:53:42,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 61 [2022-02-14 15:53:42,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596429068] [2022-02-14 15:53:42,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:53:42,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-14 15:53:42,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:53:42,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-14 15:53:42,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=2986, Unknown=0, NotChecked=0, Total=3660 [2022-02-14 15:53:42,955 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 61 states, 61 states have (on average 1.7540983606557377) internal successors, (107), 60 states have internal predecessors, (107), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:53:49,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:53:49,927 INFO L93 Difference]: Finished difference Result 1021 states and 1293 transitions. [2022-02-14 15:53:49,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-14 15:53:49,928 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.7540983606557377) internal successors, (107), 60 states have internal predecessors, (107), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-02-14 15:53:49,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:53:49,930 INFO L225 Difference]: With dead ends: 1021 [2022-02-14 15:53:49,930 INFO L226 Difference]: Without dead ends: 965 [2022-02-14 15:53:49,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7908 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3755, Invalid=18001, Unknown=0, NotChecked=0, Total=21756 [2022-02-14 15:53:49,932 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 268 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:53:49,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 134 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:53:49,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2022-02-14 15:53:50,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 171. [2022-02-14 15:53:50,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 136 states have internal predecessors, (154), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:53:50,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-02-14 15:53:50,578 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 137 [2022-02-14 15:53:50,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:53:50,578 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-02-14 15:53:50,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.7540983606557377) internal successors, (107), 60 states have internal predecessors, (107), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:53:50,579 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-02-14 15:53:50,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-14 15:53:50,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:53:50,579 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:53:50,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-02-14 15:53:50,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-02-14 15:53:50,779 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:53:50,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:53:50,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1227480356, now seen corresponding path program 94 times [2022-02-14 15:53:50,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:53:50,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126159317] [2022-02-14 15:53:50,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:53:50,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:53:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:51,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:53:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:51,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:53:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:51,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:53:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:51,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:53:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:51,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:53:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:51,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:53:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:51,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:53:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:51,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:53:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:51,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-14 15:53:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:51,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-14 15:53:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:51,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 15:53:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:51,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-14 15:53:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:51,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-14 15:53:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:51,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-14 15:53:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:51,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 15:53:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:51,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-02-14 15:53:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:53:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 332 proven. 127 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:53:51,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:53:51,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126159317] [2022-02-14 15:53:51,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126159317] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:53:51,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489933760] [2022-02-14 15:53:51,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:53:51,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:53:51,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:53:51,180 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:53:51,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-02-14 15:53:51,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:53:51,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:53:51,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 15:53:51,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:53:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 375 proven. 84 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:53:52,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:53:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 375 proven. 84 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:53:52,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489933760] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:53:52,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:53:52,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 62 [2022-02-14 15:53:52,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235296173] [2022-02-14 15:53:52,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:53:52,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-14 15:53:52,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:53:52,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-14 15:53:52,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=3107, Unknown=0, NotChecked=0, Total=3782 [2022-02-14 15:53:52,313 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 62 states, 62 states have (on average 1.7419354838709677) internal successors, (108), 61 states have internal predecessors, (108), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:53:59,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:53:59,459 INFO L93 Difference]: Finished difference Result 971 states and 1226 transitions. [2022-02-14 15:53:59,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-14 15:53:59,460 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.7419354838709677) internal successors, (108), 61 states have internal predecessors, (108), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-02-14 15:53:59,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:53:59,461 INFO L225 Difference]: With dead ends: 971 [2022-02-14 15:53:59,462 INFO L226 Difference]: Without dead ends: 915 [2022-02-14 15:53:59,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9033 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4230, Invalid=20262, Unknown=0, NotChecked=0, Total=24492 [2022-02-14 15:53:59,463 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 256 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:53:59,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 131 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:53:59,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-02-14 15:54:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 171. [2022-02-14 15:54:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 136 states have internal predecessors, (154), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:54:00,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-02-14 15:54:00,100 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 137 [2022-02-14 15:54:00,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:54:00,100 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-02-14 15:54:00,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.7419354838709677) internal successors, (108), 61 states have internal predecessors, (108), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:54:00,101 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-02-14 15:54:00,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-14 15:54:00,101 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:54:00,101 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:54:00,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-02-14 15:54:00,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-02-14 15:54:00,302 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:54:00,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:54:00,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1445462461, now seen corresponding path program 95 times [2022-02-14 15:54:00,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:54:00,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384553019] [2022-02-14 15:54:00,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:54:00,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:54:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:00,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:54:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:00,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:54:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:00,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:54:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:00,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:54:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:00,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:54:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:00,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:54:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:00,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:54:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:00,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:54:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:00,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-14 15:54:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:00,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-14 15:54:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:00,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 15:54:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:00,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-14 15:54:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:00,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-14 15:54:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:00,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-14 15:54:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:00,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 15:54:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:00,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-02-14 15:54:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 332 proven. 119 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:00,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:54:00,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384553019] [2022-02-14 15:54:00,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384553019] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:54:00,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986770839] [2022-02-14 15:54:00,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:54:00,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:54:00,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:54:00,689 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:54:00,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-02-14 15:54:00,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-02-14 15:54:00,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:54:00,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 15:54:00,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:54:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 375 proven. 76 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:01,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:54:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 375 proven. 76 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:01,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986770839] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:54:01,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:54:01,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 63 [2022-02-14 15:54:01,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104426438] [2022-02-14 15:54:01,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:54:01,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-14 15:54:01,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:54:01,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-14 15:54:01,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=3226, Unknown=0, NotChecked=0, Total=3906 [2022-02-14 15:54:01,839 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 63 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 62 states have internal predecessors, (109), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:54:08,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:54:08,856 INFO L93 Difference]: Finished difference Result 920 states and 1158 transitions. [2022-02-14 15:54:08,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-14 15:54:08,856 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 62 states have internal predecessors, (109), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-02-14 15:54:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:54:08,858 INFO L225 Difference]: With dead ends: 920 [2022-02-14 15:54:08,858 INFO L226 Difference]: Without dead ends: 864 [2022-02-14 15:54:08,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9921 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4627, Invalid=22105, Unknown=0, NotChecked=0, Total=26732 [2022-02-14 15:54:08,859 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 234 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:54:08,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 124 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:54:08,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-02-14 15:54:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 171. [2022-02-14 15:54:09,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 136 states have internal predecessors, (154), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:54:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-02-14 15:54:09,435 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 137 [2022-02-14 15:54:09,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:54:09,435 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-02-14 15:54:09,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 62 states have internal predecessors, (109), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:54:09,435 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-02-14 15:54:09,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-14 15:54:09,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:54:09,435 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:54:09,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-02-14 15:54:09,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:54:09,636 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:54:09,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:54:09,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1592656132, now seen corresponding path program 96 times [2022-02-14 15:54:09,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:54:09,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709937481] [2022-02-14 15:54:09,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:54:09,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:54:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:10,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:54:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:10,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:54:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:10,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:54:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:10,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:54:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:10,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:54:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:10,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:54:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:10,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:54:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:10,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:54:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:10,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-14 15:54:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:10,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-14 15:54:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:10,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 15:54:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:10,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-14 15:54:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:10,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-14 15:54:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:10,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-14 15:54:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:10,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 15:54:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:10,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-02-14 15:54:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 332 proven. 113 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:10,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:54:10,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709937481] [2022-02-14 15:54:10,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709937481] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:54:10,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155501319] [2022-02-14 15:54:10,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:54:10,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:54:10,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:54:10,043 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:54:10,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-02-14 15:54:10,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-02-14 15:54:10,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:54:10,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 15:54:10,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:54:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 375 proven. 70 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:10,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:54:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 375 proven. 70 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:11,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155501319] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:54:11,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:54:11,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 64 [2022-02-14 15:54:11,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4669940] [2022-02-14 15:54:11,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:54:11,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-14 15:54:11,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:54:11,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-14 15:54:11,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=689, Invalid=3343, Unknown=0, NotChecked=0, Total=4032 [2022-02-14 15:54:11,215 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 64 states, 64 states have (on average 1.71875) internal successors, (110), 63 states have internal predecessors, (110), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:54:18,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:54:18,402 INFO L93 Difference]: Finished difference Result 868 states and 1089 transitions. [2022-02-14 15:54:18,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-02-14 15:54:18,402 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.71875) internal successors, (110), 63 states have internal predecessors, (110), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-02-14 15:54:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:54:18,404 INFO L225 Difference]: With dead ends: 868 [2022-02-14 15:54:18,404 INFO L226 Difference]: Without dead ends: 812 [2022-02-14 15:54:18,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10547 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4925, Invalid=23467, Unknown=0, NotChecked=0, Total=28392 [2022-02-14 15:54:18,405 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 260 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 15:54:18,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 141 Invalid, 2431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 1905 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 15:54:18,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-02-14 15:54:19,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 171. [2022-02-14 15:54:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 136 states have internal predecessors, (154), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:54:19,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-02-14 15:54:19,028 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 137 [2022-02-14 15:54:19,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:54:19,028 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-02-14 15:54:19,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.71875) internal successors, (110), 63 states have internal predecessors, (110), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:54:19,028 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-02-14 15:54:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-14 15:54:19,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:54:19,028 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:54:19,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-02-14 15:54:19,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:54:19,229 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:54:19,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:54:19,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1285052003, now seen corresponding path program 97 times [2022-02-14 15:54:19,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:54:19,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410982069] [2022-02-14 15:54:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:54:19,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:54:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:19,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:54:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:19,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:54:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:19,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:54:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:19,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:54:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:19,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:54:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:19,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:54:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:19,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:54:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:19,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:54:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:19,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-14 15:54:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:19,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-14 15:54:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:19,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 15:54:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:19,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-14 15:54:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:19,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-14 15:54:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:19,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-14 15:54:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:19,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 15:54:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:19,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-02-14 15:54:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 332 proven. 109 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:19,631 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:54:19,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410982069] [2022-02-14 15:54:19,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410982069] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:54:19,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145065385] [2022-02-14 15:54:19,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:54:19,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:54:19,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:54:19,632 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:54:19,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-02-14 15:54:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:19,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 15:54:19,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:54:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 375 proven. 66 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:20,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:54:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 375 proven. 66 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:20,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145065385] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:54:20,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:54:20,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 65 [2022-02-14 15:54:20,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282878560] [2022-02-14 15:54:20,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:54:20,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-14 15:54:20,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:54:20,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-14 15:54:20,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=3458, Unknown=0, NotChecked=0, Total=4160 [2022-02-14 15:54:20,800 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 65 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 64 states have internal predecessors, (111), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:54:27,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:54:27,808 INFO L93 Difference]: Finished difference Result 815 states and 1019 transitions. [2022-02-14 15:54:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-02-14 15:54:27,809 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 64 states have internal predecessors, (111), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-02-14 15:54:27,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:54:27,810 INFO L225 Difference]: With dead ends: 815 [2022-02-14 15:54:27,810 INFO L226 Difference]: Without dead ends: 759 [2022-02-14 15:54:27,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10898 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5109, Invalid=24303, Unknown=0, NotChecked=0, Total=29412 [2022-02-14 15:54:27,811 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 198 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1754 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 1754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 15:54:27,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 132 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 1754 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 15:54:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-02-14 15:54:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 171. [2022-02-14 15:54:28,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 136 states have internal predecessors, (154), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:54:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-02-14 15:54:28,393 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 137 [2022-02-14 15:54:28,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:54:28,393 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-02-14 15:54:28,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 64 states have internal predecessors, (111), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:54:28,393 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-02-14 15:54:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-14 15:54:28,393 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:54:28,393 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:54:28,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-02-14 15:54:28,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:54:28,594 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:54:28,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:54:28,594 INFO L85 PathProgramCache]: Analyzing trace with hash 339258596, now seen corresponding path program 98 times [2022-02-14 15:54:28,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:54:28,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156877541] [2022-02-14 15:54:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:54:28,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:54:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:28,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:54:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:28,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:54:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:28,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:54:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:28,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:54:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:28,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:54:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:28,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:54:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:28,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:54:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:28,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:54:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:28,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-14 15:54:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:28,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-14 15:54:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:28,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 15:54:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:28,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-14 15:54:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:28,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-14 15:54:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:28,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-14 15:54:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:28,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 15:54:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:28,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-02-14 15:54:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 332 proven. 107 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:28,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:54:28,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156877541] [2022-02-14 15:54:28,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156877541] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:54:28,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840005651] [2022-02-14 15:54:28,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:54:28,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:54:28,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:54:28,987 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:54:28,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-02-14 15:54:29,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:54:29,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:54:29,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 15:54:29,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:54:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 375 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:29,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:54:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 375 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:30,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840005651] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:54:30,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:54:30,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 66 [2022-02-14 15:54:30,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727091056] [2022-02-14 15:54:30,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:54:30,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-14 15:54:30,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:54:30,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-14 15:54:30,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=719, Invalid=3571, Unknown=0, NotChecked=0, Total=4290 [2022-02-14 15:54:30,171 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 66 states, 66 states have (on average 1.696969696969697) internal successors, (112), 65 states have internal predecessors, (112), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:54:37,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:54:37,103 INFO L93 Difference]: Finished difference Result 761 states and 948 transitions. [2022-02-14 15:54:37,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-02-14 15:54:37,104 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.696969696969697) internal successors, (112), 65 states have internal predecessors, (112), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-02-14 15:54:37,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:54:37,105 INFO L225 Difference]: With dead ends: 761 [2022-02-14 15:54:37,105 INFO L226 Difference]: Without dead ends: 705 [2022-02-14 15:54:37,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10973 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5170, Invalid=24586, Unknown=0, NotChecked=0, Total=29756 [2022-02-14 15:54:37,106 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 179 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 15:54:37,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 133 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 15:54:37,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-02-14 15:54:37,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 171. [2022-02-14 15:54:37,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 136 states have internal predecessors, (154), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:54:37,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-02-14 15:54:37,690 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 137 [2022-02-14 15:54:37,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:54:37,690 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-02-14 15:54:37,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.696969696969697) internal successors, (112), 65 states have internal predecessors, (112), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:54:37,690 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-02-14 15:54:37,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-14 15:54:37,691 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:54:37,691 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:54:37,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-02-14 15:54:37,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-02-14 15:54:37,891 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:54:37,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:54:37,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1084434051, now seen corresponding path program 99 times [2022-02-14 15:54:37,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:54:37,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31126871] [2022-02-14 15:54:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:54:37,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:54:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:38,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:54:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:38,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:54:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:38,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:54:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:38,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:54:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:38,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:54:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:38,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:54:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:38,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:54:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:38,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:54:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:38,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-14 15:54:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:38,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-14 15:54:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:38,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 15:54:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:38,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-14 15:54:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:38,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-14 15:54:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:38,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-14 15:54:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:38,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 15:54:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:38,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-02-14 15:54:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 332 proven. 107 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:38,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:54:38,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31126871] [2022-02-14 15:54:38,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31126871] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:54:38,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758625207] [2022-02-14 15:54:38,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:54:38,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:54:38,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:54:38,283 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:54:38,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-02-14 15:54:38,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-02-14 15:54:38,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:54:38,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 15:54:38,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:54:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 375 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:39,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:54:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 375 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:39,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758625207] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:54:39,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:54:39,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 67 [2022-02-14 15:54:39,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248768540] [2022-02-14 15:54:39,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:54:39,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-14 15:54:39,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:54:39,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-14 15:54:39,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=740, Invalid=3682, Unknown=0, NotChecked=0, Total=4422 [2022-02-14 15:54:39,515 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 67 states, 67 states have (on average 1.6865671641791045) internal successors, (113), 66 states have internal predecessors, (113), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:54:46,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:54:46,186 INFO L93 Difference]: Finished difference Result 706 states and 876 transitions. [2022-02-14 15:54:46,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-02-14 15:54:46,186 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.6865671641791045) internal successors, (113), 66 states have internal predecessors, (113), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-02-14 15:54:46,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:54:46,188 INFO L225 Difference]: With dead ends: 706 [2022-02-14 15:54:46,188 INFO L226 Difference]: Without dead ends: 650 [2022-02-14 15:54:46,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10778 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5105, Invalid=24307, Unknown=0, NotChecked=0, Total=29412 [2022-02-14 15:54:46,190 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 164 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1837 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 1837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 15:54:46,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 140 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 1837 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 15:54:46,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-02-14 15:54:46,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 171. [2022-02-14 15:54:46,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 136 states have internal predecessors, (154), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:54:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-02-14 15:54:46,850 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 137 [2022-02-14 15:54:46,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:54:46,850 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-02-14 15:54:46,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.6865671641791045) internal successors, (113), 66 states have internal predecessors, (113), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:54:46,851 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-02-14 15:54:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-14 15:54:46,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:54:46,851 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:54:46,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-02-14 15:54:47,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-02-14 15:54:47,051 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:54:47,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:54:47,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1584930620, now seen corresponding path program 100 times [2022-02-14 15:54:47,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:54:47,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550451078] [2022-02-14 15:54:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:54:47,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:54:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:47,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:54:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:47,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:54:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:47,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:54:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:47,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:54:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:47,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:54:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:47,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:54:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:47,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:54:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:47,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:54:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:47,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-14 15:54:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:47,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-14 15:54:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:47,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 15:54:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:47,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-14 15:54:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:47,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-14 15:54:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:47,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-14 15:54:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:47,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 15:54:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:47,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-02-14 15:54:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 332 proven. 109 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:47,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:54:47,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550451078] [2022-02-14 15:54:47,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550451078] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:54:47,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248867120] [2022-02-14 15:54:47,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:54:47,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:54:47,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:54:47,453 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:54:47,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-02-14 15:54:47,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:54:47,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:54:47,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 15:54:47,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:54:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 375 proven. 66 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:48,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:54:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 375 proven. 66 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:48,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248867120] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:54:48,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:54:48,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 68 [2022-02-14 15:54:48,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503470294] [2022-02-14 15:54:48,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:54:48,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-14 15:54:48,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:54:48,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-14 15:54:48,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3791, Unknown=0, NotChecked=0, Total=4556 [2022-02-14 15:54:48,715 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 68 states, 68 states have (on average 1.6764705882352942) internal successors, (114), 67 states have internal predecessors, (114), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:54:55,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:54:55,104 INFO L93 Difference]: Finished difference Result 650 states and 803 transitions. [2022-02-14 15:54:55,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-14 15:54:55,104 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.6764705882352942) internal successors, (114), 67 states have internal predecessors, (114), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-02-14 15:54:55,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:54:55,105 INFO L225 Difference]: With dead ends: 650 [2022-02-14 15:54:55,105 INFO L226 Difference]: Without dead ends: 594 [2022-02-14 15:54:55,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 275 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10321 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4917, Invalid=23475, Unknown=0, NotChecked=0, Total=28392 [2022-02-14 15:54:55,107 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 157 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 15:54:55,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 142 Invalid, 2255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 15:54:55,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-02-14 15:54:55,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 171. [2022-02-14 15:54:55,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 136 states have internal predecessors, (154), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:54:55,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-02-14 15:54:55,708 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 137 [2022-02-14 15:54:55,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:54:55,708 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-02-14 15:54:55,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.6764705882352942) internal successors, (114), 67 states have internal predecessors, (114), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:54:55,708 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-02-14 15:54:55,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-14 15:54:55,708 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:54:55,708 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:54:55,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-02-14 15:54:55,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-02-14 15:54:55,909 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:54:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:54:55,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1564110499, now seen corresponding path program 101 times [2022-02-14 15:54:55,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:54:55,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481320120] [2022-02-14 15:54:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:54:55,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:54:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:56,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:54:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:56,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:54:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:56,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:54:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:56,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:54:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:56,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:54:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:56,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:54:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:56,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:54:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:56,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:54:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:56,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-14 15:54:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:56,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-14 15:54:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:56,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 15:54:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:56,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-14 15:54:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:56,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-14 15:54:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:56,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-14 15:54:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:56,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 15:54:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:56,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-02-14 15:54:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:54:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 332 proven. 113 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:56,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:54:56,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481320120] [2022-02-14 15:54:56,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481320120] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:54:56,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578066199] [2022-02-14 15:54:56,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:54:56,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:54:56,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:54:56,303 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:54:56,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-02-14 15:54:56,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-02-14 15:54:56,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:54:56,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 15:54:56,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:54:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 375 proven. 70 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:57,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:54:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 375 proven. 70 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:54:57,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578066199] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:54:57,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:54:57,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 69 [2022-02-14 15:54:57,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687785950] [2022-02-14 15:54:57,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:54:57,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-14 15:54:57,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:54:57,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-14 15:54:57,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=794, Invalid=3898, Unknown=0, NotChecked=0, Total=4692 [2022-02-14 15:54:57,554 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 69 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 68 states have internal predecessors, (115), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:55:03,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:55:03,279 INFO L93 Difference]: Finished difference Result 593 states and 729 transitions. [2022-02-14 15:55:03,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-14 15:55:03,280 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 68 states have internal predecessors, (115), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-02-14 15:55:03,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:55:03,281 INFO L225 Difference]: With dead ends: 593 [2022-02-14 15:55:03,281 INFO L226 Difference]: Without dead ends: 537 [2022-02-14 15:55:03,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9621 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4615, Invalid=22117, Unknown=0, NotChecked=0, Total=26732 [2022-02-14 15:55:03,282 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 123 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:55:03,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 110 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:55:03,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-02-14 15:55:03,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 171. [2022-02-14 15:55:03,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 136 states have internal predecessors, (154), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:55:03,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-02-14 15:55:03,898 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 137 [2022-02-14 15:55:03,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:55:03,898 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-02-14 15:55:03,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 68 states have internal predecessors, (115), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:55:03,898 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-02-14 15:55:03,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-14 15:55:03,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:55:03,899 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:55:03,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-02-14 15:55:04,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:55:04,099 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:55:04,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:55:04,099 INFO L85 PathProgramCache]: Analyzing trace with hash 400137380, now seen corresponding path program 102 times [2022-02-14 15:55:04,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:55:04,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397889996] [2022-02-14 15:55:04,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:55:04,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:55:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:04,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:55:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:04,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:55:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:04,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:55:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:04,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:55:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:04,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:55:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:04,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:55:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:04,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:55:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:04,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:55:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:04,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-14 15:55:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:04,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-14 15:55:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:04,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 15:55:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:04,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-14 15:55:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:04,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-14 15:55:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:04,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-14 15:55:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:04,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 15:55:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:04,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-02-14 15:55:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 332 proven. 119 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:55:04,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:55:04,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397889996] [2022-02-14 15:55:04,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397889996] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:55:04,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239020303] [2022-02-14 15:55:04,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:55:04,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:55:04,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:55:04,498 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:55:04,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-02-14 15:55:04,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-02-14 15:55:04,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:55:04,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 15:55:04,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:55:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 375 proven. 76 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:55:05,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:55:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 375 proven. 76 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:55:05,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239020303] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:55:05,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:55:05,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 70 [2022-02-14 15:55:05,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972937809] [2022-02-14 15:55:05,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:55:05,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-14 15:55:05,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:55:05,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-14 15:55:05,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=4003, Unknown=0, NotChecked=0, Total=4830 [2022-02-14 15:55:05,780 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 70 states, 70 states have (on average 1.6571428571428573) internal successors, (116), 69 states have internal predecessors, (116), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:55:11,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:55:11,065 INFO L93 Difference]: Finished difference Result 535 states and 654 transitions. [2022-02-14 15:55:11,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-14 15:55:11,066 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.6571428571428573) internal successors, (116), 69 states have internal predecessors, (116), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-02-14 15:55:11,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:55:11,066 INFO L225 Difference]: With dead ends: 535 [2022-02-14 15:55:11,067 INFO L226 Difference]: Without dead ends: 479 [2022-02-14 15:55:11,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8709 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4214, Invalid=20278, Unknown=0, NotChecked=0, Total=24492 [2022-02-14 15:55:11,068 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 121 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:55:11,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 92 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:55:11,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-02-14 15:55:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 171. [2022-02-14 15:55:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 136 states have internal predecessors, (154), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:55:11,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-02-14 15:55:11,691 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 137 [2022-02-14 15:55:11,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:55:11,691 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-02-14 15:55:11,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.6571428571428573) internal successors, (116), 69 states have internal predecessors, (116), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:55:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-02-14 15:55:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-14 15:55:11,691 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:55:11,691 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:55:11,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-02-14 15:55:11,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-02-14 15:55:11,892 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:55:11,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:55:11,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1323290941, now seen corresponding path program 103 times [2022-02-14 15:55:11,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:55:11,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976760181] [2022-02-14 15:55:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:55:11,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:55:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:12,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:55:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:12,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:55:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:12,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:55:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:12,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:55:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:12,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:55:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:12,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:55:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:12,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:55:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:12,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:55:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:12,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-14 15:55:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:12,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-14 15:55:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:12,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 15:55:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:12,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-14 15:55:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:12,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-14 15:55:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:12,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-14 15:55:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:12,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 15:55:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:12,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-02-14 15:55:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 332 proven. 127 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:55:12,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:55:12,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976760181] [2022-02-14 15:55:12,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976760181] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:55:12,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167382375] [2022-02-14 15:55:12,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:55:12,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:55:12,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:55:12,332 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:55:12,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-02-14 15:55:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:12,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 15:55:12,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:55:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 375 proven. 84 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:55:13,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:55:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 375 proven. 84 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:55:13,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167382375] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:55:13,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:55:13,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 71 [2022-02-14 15:55:13,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119224160] [2022-02-14 15:55:13,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:55:13,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-14 15:55:13,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:55:13,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-14 15:55:13,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=864, Invalid=4106, Unknown=0, NotChecked=0, Total=4970 [2022-02-14 15:55:13,627 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 71 states, 71 states have (on average 1.647887323943662) internal successors, (117), 70 states have internal predecessors, (117), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:55:18,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:55:18,353 INFO L93 Difference]: Finished difference Result 476 states and 578 transitions. [2022-02-14 15:55:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-14 15:55:18,353 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.647887323943662) internal successors, (117), 70 states have internal predecessors, (117), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-02-14 15:55:18,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:55:18,354 INFO L225 Difference]: With dead ends: 476 [2022-02-14 15:55:18,354 INFO L226 Difference]: Without dead ends: 420 [2022-02-14 15:55:18,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 272 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7628 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3735, Invalid=18021, Unknown=0, NotChecked=0, Total=21756 [2022-02-14 15:55:18,355 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 97 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:55:18,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 115 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1427 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:55:18,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-02-14 15:55:18,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 171. [2022-02-14 15:55:18,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 136 states have internal predecessors, (154), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:55:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-02-14 15:55:18,989 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 137 [2022-02-14 15:55:18,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:55:18,990 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-02-14 15:55:18,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.647887323943662) internal successors, (117), 70 states have internal predecessors, (117), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:55:18,990 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-02-14 15:55:18,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-14 15:55:18,990 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:55:18,990 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:55:19,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-02-14 15:55:19,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-02-14 15:55:19,191 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:55:19,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:55:19,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1085005956, now seen corresponding path program 104 times [2022-02-14 15:55:19,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:55:19,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756745190] [2022-02-14 15:55:19,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:55:19,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:55:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:19,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:55:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:19,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:55:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:19,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:55:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:19,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:55:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:19,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:55:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:19,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:55:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:19,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:55:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:19,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:55:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:19,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-14 15:55:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:19,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-14 15:55:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:19,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 15:55:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:19,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-14 15:55:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:19,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-14 15:55:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:19,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-14 15:55:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:19,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 15:55:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:19,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-02-14 15:55:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 332 proven. 137 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:55:19,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:55:19,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756745190] [2022-02-14 15:55:19,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756745190] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:55:19,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184631665] [2022-02-14 15:55:19,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:55:19,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:55:19,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:55:19,595 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:55:19,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-02-14 15:55:19,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:55:19,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:55:19,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 15:55:19,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:55:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 375 proven. 94 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:55:20,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:55:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 375 proven. 94 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:55:20,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184631665] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:55:20,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:55:20,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 72 [2022-02-14 15:55:20,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922785708] [2022-02-14 15:55:20,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:55:20,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-14 15:55:20,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:55:20,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-14 15:55:20,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=4207, Unknown=0, NotChecked=0, Total=5112 [2022-02-14 15:55:20,950 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 72 states, 72 states have (on average 1.6388888888888888) internal successors, (118), 71 states have internal predecessors, (118), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:55:24,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:55:24,992 INFO L93 Difference]: Finished difference Result 416 states and 501 transitions. [2022-02-14 15:55:24,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-14 15:55:24,992 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.6388888888888888) internal successors, (118), 71 states have internal predecessors, (118), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-02-14 15:55:24,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:55:24,993 INFO L225 Difference]: With dead ends: 416 [2022-02-14 15:55:24,993 INFO L226 Difference]: Without dead ends: 360 [2022-02-14 15:55:24,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6433 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3205, Invalid=15427, Unknown=0, NotChecked=0, Total=18632 [2022-02-14 15:55:24,994 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 97 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:55:24,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 95 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:55:24,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-02-14 15:55:25,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 171. [2022-02-14 15:55:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 136 states have internal predecessors, (154), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:55:25,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-02-14 15:55:25,652 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 137 [2022-02-14 15:55:25,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:55:25,652 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-02-14 15:55:25,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.6388888888888888) internal successors, (118), 71 states have internal predecessors, (118), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:55:25,652 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-02-14 15:55:25,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-14 15:55:25,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:55:25,653 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:55:25,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-02-14 15:55:25,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:55:25,855 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:55:25,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:55:25,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1567201565, now seen corresponding path program 105 times [2022-02-14 15:55:25,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:55:25,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162996719] [2022-02-14 15:55:25,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:55:25,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:55:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:26,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:55:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:26,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:55:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:26,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:55:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:26,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:55:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:26,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:55:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:26,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:55:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:26,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:55:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:26,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:55:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:26,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-14 15:55:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:26,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-14 15:55:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:26,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 15:55:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:26,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-14 15:55:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:26,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-14 15:55:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:26,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-14 15:55:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:26,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 15:55:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:26,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-02-14 15:55:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 332 proven. 149 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:55:26,265 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:55:26,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162996719] [2022-02-14 15:55:26,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162996719] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:55:26,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145052836] [2022-02-14 15:55:26,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:55:26,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:55:26,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:55:26,266 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:55:26,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-02-14 15:55:26,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-02-14 15:55:26,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:55:26,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 15:55:26,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:55:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 375 proven. 106 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:55:27,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:55:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 375 proven. 106 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:55:27,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145052836] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:55:27,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:55:27,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 73 [2022-02-14 15:55:27,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430363338] [2022-02-14 15:55:27,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:55:27,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-14 15:55:27,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:55:27,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-14 15:55:27,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=4306, Unknown=0, NotChecked=0, Total=5256 [2022-02-14 15:55:27,596 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 73 states, 73 states have (on average 1.63013698630137) internal successors, (119), 72 states have internal predecessors, (119), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:55:30,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:55:30,787 INFO L93 Difference]: Finished difference Result 355 states and 423 transitions. [2022-02-14 15:55:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-14 15:55:30,787 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.63013698630137) internal successors, (119), 72 states have internal predecessors, (119), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-02-14 15:55:30,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:55:30,788 INFO L225 Difference]: With dead ends: 355 [2022-02-14 15:55:30,788 INFO L226 Difference]: Without dead ends: 299 [2022-02-14 15:55:30,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5174 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2657, Invalid=12595, Unknown=0, NotChecked=0, Total=15252 [2022-02-14 15:55:30,789 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 75 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:55:30,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 86 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:55:30,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-02-14 15:55:31,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 171. [2022-02-14 15:55:31,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 136 states have internal predecessors, (154), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:55:31,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-02-14 15:55:31,452 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 137 [2022-02-14 15:55:31,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:55:31,452 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-02-14 15:55:31,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.63013698630137) internal successors, (119), 72 states have internal predecessors, (119), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:55:31,452 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-02-14 15:55:31,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-14 15:55:31,452 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:55:31,452 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:55:31,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-02-14 15:55:31,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-02-14 15:55:31,653 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:55:31,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:55:31,653 INFO L85 PathProgramCache]: Analyzing trace with hash 2113711204, now seen corresponding path program 15 times [2022-02-14 15:55:31,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:55:31,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286642516] [2022-02-14 15:55:31,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:55:31,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:55:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:32,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:55:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:32,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 15:55:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:32,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-14 15:55:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:32,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-14 15:55:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:32,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:55:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:32,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 15:55:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:32,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:55:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:32,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-14 15:55:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:32,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-14 15:55:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:32,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-14 15:55:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:32,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-14 15:55:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:32,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-14 15:55:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:32,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-14 15:55:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:32,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-14 15:55:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:32,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 15:55:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:32,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-02-14 15:55:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 332 proven. 163 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:55:32,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:55:32,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286642516] [2022-02-14 15:55:32,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286642516] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:55:32,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823697539] [2022-02-14 15:55:32,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:55:32,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:55:32,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:55:32,066 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:55:32,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-02-14 15:55:32,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-02-14 15:55:32,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:55:32,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 15:55:32,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:55:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 375 proven. 120 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:55:33,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:55:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 375 proven. 120 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:55:33,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823697539] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:55:33,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:55:33,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-02-14 15:55:33,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541374684] [2022-02-14 15:55:33,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:55:33,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-14 15:55:33,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:55:33,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-14 15:55:33,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=999, Invalid=4403, Unknown=0, NotChecked=0, Total=5402 [2022-02-14 15:55:33,423 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 74 states, 74 states have (on average 1.6216216216216217) internal successors, (120), 73 states have internal predecessors, (120), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:55:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:55:35,814 INFO L93 Difference]: Finished difference Result 293 states and 344 transitions. [2022-02-14 15:55:35,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-14 15:55:35,814 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.6216216216216217) internal successors, (120), 73 states have internal predecessors, (120), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-02-14 15:55:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:55:35,815 INFO L225 Difference]: With dead ends: 293 [2022-02-14 15:55:35,815 INFO L226 Difference]: Without dead ends: 237 [2022-02-14 15:55:35,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3948 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2147, Invalid=9625, Unknown=0, NotChecked=0, Total=11772 [2022-02-14 15:55:35,816 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 51 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:55:35,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 87 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:55:35,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-02-14 15:55:36,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 173. [2022-02-14 15:55:36,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 137 states have (on average 1.1386861313868613) internal successors, (156), 138 states have internal predecessors, (156), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:55:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2022-02-14 15:55:36,533 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 137 [2022-02-14 15:55:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:55:36,533 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2022-02-14 15:55:36,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.6216216216216217) internal successors, (120), 73 states have internal predecessors, (120), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 15:55:36,533 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2022-02-14 15:55:36,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-02-14 15:55:36,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:55:36,534 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:55:36,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-02-14 15:55:36,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:55:36,734 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:55:36,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:55:36,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2104072961, now seen corresponding path program 30 times [2022-02-14 15:55:36,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:55:36,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795403028] [2022-02-14 15:55:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:55:36,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:55:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:36,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:55:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:36,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:55:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:36,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:55:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:36,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:55:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:36,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:55:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:36,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:55:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:36,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:55:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:36,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:55:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:36,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:55:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:36,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 15:55:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:36,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 15:55:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:36,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-02-14 15:55:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:36,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-14 15:55:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:36,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-02-14 15:55:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:36,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-14 15:55:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:36,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:55:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 150 proven. 361 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:55:36,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:55:36,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795403028] [2022-02-14 15:55:36,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795403028] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:55:36,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088069879] [2022-02-14 15:55:36,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:55:36,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:55:36,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:55:36,925 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:55:36,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-02-14 15:55:36,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-02-14 15:55:36,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:55:36,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-14 15:55:36,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:55:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 166 proven. 345 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:55:37,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:55:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 166 proven. 345 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 15:55:37,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088069879] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:55:37,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:55:37,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 25 [2022-02-14 15:55:37,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324603822] [2022-02-14 15:55:37,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:55:37,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-14 15:55:37,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:55:37,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-14 15:55:37,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2022-02-14 15:55:37,387 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 22 states have internal predecessors, (69), 17 states have call successors, (20), 4 states have call predecessors, (20), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:55:38,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:55:38,579 INFO L93 Difference]: Finished difference Result 186 states and 205 transitions. [2022-02-14 15:55:38,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-14 15:55:38,579 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 22 states have internal predecessors, (69), 17 states have call successors, (20), 4 states have call predecessors, (20), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 138 [2022-02-14 15:55:38,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:55:38,579 INFO L225 Difference]: With dead ends: 186 [2022-02-14 15:55:38,579 INFO L226 Difference]: Without dead ends: 184 [2022-02-14 15:55:38,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 319 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=550, Invalid=1520, Unknown=0, NotChecked=0, Total=2070 [2022-02-14 15:55:38,580 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 97 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:55:38,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 91 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:55:38,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-14 15:55:39,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2022-02-14 15:55:39,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 143 states have internal predecessors, (161), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:55:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 198 transitions. [2022-02-14 15:55:39,285 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 198 transitions. Word has length 138 [2022-02-14 15:55:39,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:55:39,285 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 198 transitions. [2022-02-14 15:55:39,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 22 states have internal predecessors, (69), 17 states have call successors, (20), 4 states have call predecessors, (20), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 15:55:39,285 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 198 transitions. [2022-02-14 15:55:39,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-14 15:55:39,285 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:55:39,285 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:55:39,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-02-14 15:55:39,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:55:39,487 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:55:39,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:55:39,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1354248838, now seen corresponding path program 31 times [2022-02-14 15:55:39,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:55:39,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522776764] [2022-02-14 15:55:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:55:39,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:55:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:55:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:55:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:55:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:55:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:55:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:55:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:55:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:55:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:55:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 15:55:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 15:55:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-02-14 15:55:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-14 15:55:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-02-14 15:55:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-14 15:55:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:55:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-02-14 15:55:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 378 proven. 182 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:55:39,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:55:39,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522776764] [2022-02-14 15:55:39,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522776764] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:55:39,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992220617] [2022-02-14 15:55:39,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:55:39,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:55:39,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:55:39,923 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:55:39,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-02-14 15:55:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:39,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 15:55:39,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:55:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 424 proven. 136 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:55:40,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:55:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 424 proven. 136 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:55:41,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992220617] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:55:41,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:55:41,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 62 [2022-02-14 15:55:41,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257503463] [2022-02-14 15:55:41,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:55:41,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-14 15:55:41,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:55:41,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-14 15:55:41,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=3023, Unknown=0, NotChecked=0, Total=3782 [2022-02-14 15:55:41,076 INFO L87 Difference]: Start difference. First operand 180 states and 198 transitions. Second operand has 62 states, 62 states have (on average 1.7741935483870968) internal successors, (110), 61 states have internal predecessors, (110), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:55:49,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:55:49,986 INFO L93 Difference]: Finished difference Result 1246 states and 1588 transitions. [2022-02-14 15:55:49,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-14 15:55:49,986 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.7741935483870968) internal successors, (110), 61 states have internal predecessors, (110), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-02-14 15:55:49,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:55:49,988 INFO L225 Difference]: With dead ends: 1246 [2022-02-14 15:55:49,988 INFO L226 Difference]: Without dead ends: 1187 [2022-02-14 15:55:49,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5694 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3004, Invalid=14026, Unknown=0, NotChecked=0, Total=17030 [2022-02-14 15:55:49,989 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 357 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 15:55:49,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 154 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 15:55:49,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2022-02-14 15:55:50,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 181. [2022-02-14 15:55:50,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 144 states have internal predecessors, (163), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:55:50,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 200 transitions. [2022-02-14 15:55:50,721 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 200 transitions. Word has length 145 [2022-02-14 15:55:50,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:55:50,721 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 200 transitions. [2022-02-14 15:55:50,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.7741935483870968) internal successors, (110), 61 states have internal predecessors, (110), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:55:50,721 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 200 transitions. [2022-02-14 15:55:50,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-14 15:55:50,721 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:55:50,721 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:55:50,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-02-14 15:55:50,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:55:50,922 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:55:50,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:55:50,922 INFO L85 PathProgramCache]: Analyzing trace with hash 2099424293, now seen corresponding path program 106 times [2022-02-14 15:55:50,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:55:50,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4424747] [2022-02-14 15:55:50,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:55:50,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:55:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:51,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:55:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:51,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:55:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:51,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:55:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:51,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:55:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:51,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:55:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:51,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:55:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:51,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:55:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:51,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:55:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:51,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:55:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:51,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 15:55:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:51,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 15:55:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:51,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-02-14 15:55:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:51,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-14 15:55:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:51,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-02-14 15:55:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:51,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-14 15:55:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:51,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:55:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:51,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-02-14 15:55:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:55:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 378 proven. 167 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:55:51,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:55:51,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4424747] [2022-02-14 15:55:51,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4424747] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:55:51,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824196636] [2022-02-14 15:55:51,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:55:51,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:55:51,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:55:51,361 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:55:51,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-02-14 15:55:51,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:55:51,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:55:51,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 15:55:51,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:55:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 424 proven. 121 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:55:52,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:55:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 424 proven. 121 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:55:52,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824196636] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:55:52,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:55:52,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 63 [2022-02-14 15:55:52,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406098297] [2022-02-14 15:55:52,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:55:52,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-14 15:55:52,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:55:52,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-14 15:55:52,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=751, Invalid=3155, Unknown=0, NotChecked=0, Total=3906 [2022-02-14 15:55:52,535 INFO L87 Difference]: Start difference. First operand 181 states and 200 transitions. Second operand has 63 states, 63 states have (on average 1.7619047619047619) internal successors, (111), 62 states have internal predecessors, (111), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:56:01,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:56:01,675 INFO L93 Difference]: Finished difference Result 1195 states and 1519 transitions. [2022-02-14 15:56:01,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-14 15:56:01,675 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.7619047619047619) internal successors, (111), 62 states have internal predecessors, (111), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-02-14 15:56:01,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:56:01,677 INFO L225 Difference]: With dead ends: 1195 [2022-02-14 15:56:01,677 INFO L226 Difference]: Without dead ends: 1136 [2022-02-14 15:56:01,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7399 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3607, Invalid=17273, Unknown=0, NotChecked=0, Total=20880 [2022-02-14 15:56:01,678 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 284 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1939 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 15:56:01,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 142 Invalid, 2241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1939 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 15:56:01,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-02-14 15:56:02,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 181. [2022-02-14 15:56:02,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 144 states have internal predecessors, (163), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:56:02,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 200 transitions. [2022-02-14 15:56:02,408 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 200 transitions. Word has length 145 [2022-02-14 15:56:02,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:56:02,408 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 200 transitions. [2022-02-14 15:56:02,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.7619047619047619) internal successors, (111), 62 states have internal predecessors, (111), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:56:02,408 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 200 transitions. [2022-02-14 15:56:02,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-14 15:56:02,408 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:56:02,409 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:56:02,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-02-14 15:56:02,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:56:02,609 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:56:02,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:56:02,609 INFO L85 PathProgramCache]: Analyzing trace with hash -569940378, now seen corresponding path program 107 times [2022-02-14 15:56:02,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:56:02,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897104219] [2022-02-14 15:56:02,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:56:02,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:56:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:03,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:56:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:03,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:56:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:03,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:56:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:03,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:56:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:03,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:56:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:03,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:56:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:03,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:56:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:03,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:56:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:03,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:56:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:03,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 15:56:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:03,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 15:56:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:03,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-02-14 15:56:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:03,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-14 15:56:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:03,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-02-14 15:56:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:03,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-14 15:56:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:03,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:56:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:03,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-02-14 15:56:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 378 proven. 154 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:56:03,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:56:03,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897104219] [2022-02-14 15:56:03,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897104219] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:56:03,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576762045] [2022-02-14 15:56:03,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:56:03,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:56:03,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:56:03,040 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:56:03,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-02-14 15:56:03,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-02-14 15:56:03,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:56:03,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 15:56:03,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:56:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 424 proven. 108 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:56:03,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:56:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 424 proven. 108 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:56:04,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576762045] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:56:04,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:56:04,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 64 [2022-02-14 15:56:04,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356408350] [2022-02-14 15:56:04,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:56:04,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-14 15:56:04,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:56:04,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-14 15:56:04,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=3285, Unknown=0, NotChecked=0, Total=4032 [2022-02-14 15:56:04,240 INFO L87 Difference]: Start difference. First operand 181 states and 200 transitions. Second operand has 64 states, 64 states have (on average 1.75) internal successors, (112), 63 states have internal predecessors, (112), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:56:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:56:13,530 INFO L93 Difference]: Finished difference Result 1143 states and 1449 transitions. [2022-02-14 15:56:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-14 15:56:13,530 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.75) internal successors, (112), 63 states have internal predecessors, (112), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-02-14 15:56:13,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:56:13,532 INFO L225 Difference]: With dead ends: 1143 [2022-02-14 15:56:13,532 INFO L226 Difference]: Without dead ends: 1084 [2022-02-14 15:56:13,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8982 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4217, Invalid=20275, Unknown=0, NotChecked=0, Total=24492 [2022-02-14 15:56:13,533 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 290 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 2457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-14 15:56:13,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 152 Invalid, 2457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 2058 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-14 15:56:13,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-02-14 15:56:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 181. [2022-02-14 15:56:14,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 144 states have internal predecessors, (163), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:56:14,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 200 transitions. [2022-02-14 15:56:14,293 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 200 transitions. Word has length 145 [2022-02-14 15:56:14,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:56:14,293 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 200 transitions. [2022-02-14 15:56:14,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.75) internal successors, (112), 63 states have internal predecessors, (112), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:56:14,293 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 200 transitions. [2022-02-14 15:56:14,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-14 15:56:14,294 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:56:14,294 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:56:14,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-02-14 15:56:14,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:56:14,494 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:56:14,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:56:14,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1715866555, now seen corresponding path program 108 times [2022-02-14 15:56:14,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:56:14,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656024881] [2022-02-14 15:56:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:56:14,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:56:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:14,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:56:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:14,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:56:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:14,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:56:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:14,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:56:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:14,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:56:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:14,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:56:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:14,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:56:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:14,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:56:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:14,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:56:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:14,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 15:56:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:14,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 15:56:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:14,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-02-14 15:56:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:14,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-14 15:56:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:14,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-02-14 15:56:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:14,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-14 15:56:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:14,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:56:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:14,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-02-14 15:56:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 378 proven. 143 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:56:14,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:56:14,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656024881] [2022-02-14 15:56:14,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656024881] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:56:14,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714345974] [2022-02-14 15:56:14,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:56:14,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:56:14,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:56:14,927 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:56:14,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-02-14 15:56:14,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-02-14 15:56:14,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:56:14,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 15:56:14,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:56:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 424 proven. 97 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:56:15,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:56:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 424 proven. 97 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:56:16,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714345974] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:56:16,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:56:16,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 65 [2022-02-14 15:56:16,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40242382] [2022-02-14 15:56:16,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:56:16,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-14 15:56:16,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:56:16,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-14 15:56:16,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=3413, Unknown=0, NotChecked=0, Total=4160 [2022-02-14 15:56:16,157 INFO L87 Difference]: Start difference. First operand 181 states and 200 transitions. Second operand has 65 states, 65 states have (on average 1.7384615384615385) internal successors, (113), 64 states have internal predecessors, (113), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:56:25,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:56:25,606 INFO L93 Difference]: Finished difference Result 1090 states and 1378 transitions. [2022-02-14 15:56:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-14 15:56:25,606 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.7384615384615385) internal successors, (113), 64 states have internal predecessors, (113), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-02-14 15:56:25,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:56:25,608 INFO L225 Difference]: With dead ends: 1090 [2022-02-14 15:56:25,608 INFO L226 Difference]: Without dead ends: 1031 [2022-02-14 15:56:25,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10327 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4780, Invalid=22942, Unknown=0, NotChecked=0, Total=27722 [2022-02-14 15:56:25,609 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 255 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 15:56:25,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 140 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 15:56:25,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2022-02-14 15:56:26,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 181. [2022-02-14 15:56:26,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 144 states have internal predecessors, (163), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:56:26,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 200 transitions. [2022-02-14 15:56:26,435 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 200 transitions. Word has length 145 [2022-02-14 15:56:26,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:56:26,435 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 200 transitions. [2022-02-14 15:56:26,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.7384615384615385) internal successors, (113), 64 states have internal predecessors, (113), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:56:26,435 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 200 transitions. [2022-02-14 15:56:26,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-14 15:56:26,436 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:56:26,436 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:56:26,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-02-14 15:56:26,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-02-14 15:56:26,636 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:56:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:56:26,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1415127622, now seen corresponding path program 109 times [2022-02-14 15:56:26,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:56:26,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051071212] [2022-02-14 15:56:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:56:26,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:56:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:56:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:56:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:56:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:56:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:56:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:56:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:56:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:56:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:56:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 15:56:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 15:56:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-02-14 15:56:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-14 15:56:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-02-14 15:56:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-14 15:56:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:56:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-02-14 15:56:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 378 proven. 134 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:56:27,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:56:27,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051071212] [2022-02-14 15:56:27,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051071212] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:56:27,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219428136] [2022-02-14 15:56:27,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:56:27,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:56:27,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:56:27,076 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:56:27,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-02-14 15:56:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:27,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 15:56:27,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:56:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 424 proven. 88 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:56:28,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:56:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 424 proven. 88 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:56:28,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219428136] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:56:28,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:56:28,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 66 [2022-02-14 15:56:28,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846838671] [2022-02-14 15:56:28,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:56:28,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-14 15:56:28,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:56:28,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-14 15:56:28,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=751, Invalid=3539, Unknown=0, NotChecked=0, Total=4290 [2022-02-14 15:56:28,339 INFO L87 Difference]: Start difference. First operand 181 states and 200 transitions. Second operand has 66 states, 66 states have (on average 1.7272727272727273) internal successors, (114), 65 states have internal predecessors, (114), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:56:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:56:38,208 INFO L93 Difference]: Finished difference Result 1036 states and 1306 transitions. [2022-02-14 15:56:38,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-02-14 15:56:38,209 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.7272727272727273) internal successors, (114), 65 states have internal predecessors, (114), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-02-14 15:56:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:56:38,210 INFO L225 Difference]: With dead ends: 1036 [2022-02-14 15:56:38,210 INFO L226 Difference]: Without dead ends: 977 [2022-02-14 15:56:38,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11427 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5266, Invalid=25184, Unknown=0, NotChecked=0, Total=30450 [2022-02-14 15:56:38,212 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 266 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2349 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 2349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-14 15:56:38,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 161 Invalid, 2817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 2349 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-14 15:56:38,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-02-14 15:56:38,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 181. [2022-02-14 15:56:38,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 144 states have internal predecessors, (163), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:56:38,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 200 transitions. [2022-02-14 15:56:38,993 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 200 transitions. Word has length 145 [2022-02-14 15:56:38,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:56:38,993 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 200 transitions. [2022-02-14 15:56:38,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.7272727272727273) internal successors, (114), 65 states have internal predecessors, (114), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:56:38,994 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 200 transitions. [2022-02-14 15:56:38,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-14 15:56:38,994 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:56:38,994 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:56:39,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-02-14 15:56:39,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-02-14 15:56:39,194 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:56:39,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:56:39,195 INFO L85 PathProgramCache]: Analyzing trace with hash -308300699, now seen corresponding path program 110 times [2022-02-14 15:56:39,195 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:56:39,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760962653] [2022-02-14 15:56:39,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:56:39,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:56:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:39,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:56:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:39,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:56:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:39,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:56:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:39,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:56:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:39,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:56:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:39,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:56:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:39,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:56:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:39,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:56:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:39,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:56:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:39,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 15:56:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:39,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 15:56:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:39,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-02-14 15:56:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:39,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-14 15:56:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:39,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-02-14 15:56:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:39,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-14 15:56:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:39,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:56:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:39,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-02-14 15:56:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 378 proven. 127 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:56:39,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:56:39,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760962653] [2022-02-14 15:56:39,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760962653] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:56:39,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509880935] [2022-02-14 15:56:39,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:56:39,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:56:39,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:56:39,627 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:56:39,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-02-14 15:56:39,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:56:39,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:56:39,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 15:56:39,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:56:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 424 proven. 81 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:56:40,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:56:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 424 proven. 81 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:56:40,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509880935] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:56:40,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:56:40,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 67 [2022-02-14 15:56:40,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177353220] [2022-02-14 15:56:40,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:56:40,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-14 15:56:40,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:56:40,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-14 15:56:40,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=3663, Unknown=0, NotChecked=0, Total=4422 [2022-02-14 15:56:40,883 INFO L87 Difference]: Start difference. First operand 181 states and 200 transitions. Second operand has 67 states, 67 states have (on average 1.7164179104477613) internal successors, (115), 66 states have internal predecessors, (115), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:56:50,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:56:50,474 INFO L93 Difference]: Finished difference Result 981 states and 1233 transitions. [2022-02-14 15:56:50,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-14 15:56:50,474 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.7164179104477613) internal successors, (115), 66 states have internal predecessors, (115), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-02-14 15:56:50,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:56:50,475 INFO L225 Difference]: With dead ends: 981 [2022-02-14 15:56:50,475 INFO L226 Difference]: Without dead ends: 922 [2022-02-14 15:56:50,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12251 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5651, Invalid=26929, Unknown=0, NotChecked=0, Total=32580 [2022-02-14 15:56:50,477 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 205 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 15:56:50,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 140 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 15:56:50,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-02-14 15:56:51,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 181. [2022-02-14 15:56:51,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 144 states have internal predecessors, (163), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:56:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 200 transitions. [2022-02-14 15:56:51,283 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 200 transitions. Word has length 145 [2022-02-14 15:56:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:56:51,283 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 200 transitions. [2022-02-14 15:56:51,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.7164179104477613) internal successors, (115), 66 states have internal predecessors, (115), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:56:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 200 transitions. [2022-02-14 15:56:51,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-14 15:56:51,284 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:56:51,284 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:56:51,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-02-14 15:56:51,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-02-14 15:56:51,484 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:56:51,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:56:51,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2099996198, now seen corresponding path program 111 times [2022-02-14 15:56:51,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:56:51,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350497942] [2022-02-14 15:56:51,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:56:51,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:56:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:51,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:56:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:51,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:56:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:51,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:56:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:51,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:56:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:51,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:56:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:51,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:56:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:51,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:56:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:51,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:56:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:51,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:56:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:51,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 15:56:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:51,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 15:56:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:51,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-02-14 15:56:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:51,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-14 15:56:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:51,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-02-14 15:56:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:51,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-14 15:56:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:51,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:56:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:51,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-02-14 15:56:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:56:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 378 proven. 122 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:56:51,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:56:51,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350497942] [2022-02-14 15:56:51,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350497942] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:56:51,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062154528] [2022-02-14 15:56:51,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:56:51,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:56:51,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:56:51,915 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:56:51,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-02-14 15:56:51,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-02-14 15:56:51,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:56:51,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 15:56:51,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:56:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 424 proven. 76 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:56:52,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:56:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 424 proven. 76 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:56:53,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062154528] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:56:53,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:56:53,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 68 [2022-02-14 15:56:53,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385628625] [2022-02-14 15:56:53,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:56:53,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-14 15:56:53,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:56:53,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-14 15:56:53,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=3785, Unknown=0, NotChecked=0, Total=4556 [2022-02-14 15:56:53,224 INFO L87 Difference]: Start difference. First operand 181 states and 200 transitions. Second operand has 68 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 67 states have internal predecessors, (116), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:57:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:57:02,670 INFO L93 Difference]: Finished difference Result 925 states and 1159 transitions. [2022-02-14 15:57:02,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-02-14 15:57:02,670 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 67 states have internal predecessors, (116), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-02-14 15:57:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:57:02,672 INFO L225 Difference]: With dead ends: 925 [2022-02-14 15:57:02,672 INFO L226 Difference]: Without dead ends: 866 [2022-02-14 15:57:02,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12780 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5917, Invalid=28123, Unknown=0, NotChecked=0, Total=34040 [2022-02-14 15:57:02,673 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 195 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:57:02,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 122 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:57:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-02-14 15:57:03,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 181. [2022-02-14 15:57:03,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 144 states have internal predecessors, (163), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:57:03,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 200 transitions. [2022-02-14 15:57:03,489 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 200 transitions. Word has length 145 [2022-02-14 15:57:03,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:57:03,490 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 200 transitions. [2022-02-14 15:57:03,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 67 states have internal predecessors, (116), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:57:03,490 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 200 transitions. [2022-02-14 15:57:03,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-14 15:57:03,490 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:57:03,490 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:57:03,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-02-14 15:57:03,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:57:03,691 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:57:03,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:57:03,691 INFO L85 PathProgramCache]: Analyzing trace with hash -552211323, now seen corresponding path program 112 times [2022-02-14 15:57:03,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:57:03,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960353350] [2022-02-14 15:57:03,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:57:03,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:57:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:04,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:57:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:04,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:57:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:04,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:57:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:04,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:57:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:04,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:57:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:04,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:57:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:04,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:57:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:04,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:57:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:04,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:57:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:04,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 15:57:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:04,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 15:57:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:04,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-02-14 15:57:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:04,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-14 15:57:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:04,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-02-14 15:57:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:04,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-14 15:57:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:04,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:57:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:04,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-02-14 15:57:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 378 proven. 119 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:57:04,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:57:04,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960353350] [2022-02-14 15:57:04,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960353350] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:57:04,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237226236] [2022-02-14 15:57:04,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:57:04,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:57:04,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:57:04,124 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:57:04,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-02-14 15:57:04,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:57:04,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:57:04,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 15:57:04,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:57:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 424 proven. 73 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:57:05,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:57:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 424 proven. 73 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:57:05,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237226236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:57:05,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:57:05,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 69 [2022-02-14 15:57:05,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503985905] [2022-02-14 15:57:05,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:57:05,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-14 15:57:05,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:57:05,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-14 15:57:05,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=3905, Unknown=0, NotChecked=0, Total=4692 [2022-02-14 15:57:05,421 INFO L87 Difference]: Start difference. First operand 181 states and 200 transitions. Second operand has 69 states, 69 states have (on average 1.6956521739130435) internal successors, (117), 68 states have internal predecessors, (117), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:57:14,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:57:14,711 INFO L93 Difference]: Finished difference Result 868 states and 1084 transitions. [2022-02-14 15:57:14,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-02-14 15:57:14,712 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.6956521739130435) internal successors, (117), 68 states have internal predecessors, (117), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-02-14 15:57:14,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:57:14,713 INFO L225 Difference]: With dead ends: 868 [2022-02-14 15:57:14,713 INFO L226 Difference]: Without dead ends: 809 [2022-02-14 15:57:14,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13007 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6052, Invalid=28730, Unknown=0, NotChecked=0, Total=34782 [2022-02-14 15:57:14,714 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 182 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 15:57:14,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 129 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 15:57:14,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-02-14 15:57:15,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 181. [2022-02-14 15:57:15,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 144 states have internal predecessors, (163), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:57:15,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 200 transitions. [2022-02-14 15:57:15,546 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 200 transitions. Word has length 145 [2022-02-14 15:57:15,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:57:15,547 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 200 transitions. [2022-02-14 15:57:15,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.6956521739130435) internal successors, (117), 68 states have internal predecessors, (117), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:57:15,547 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 200 transitions. [2022-02-14 15:57:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-14 15:57:15,547 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:57:15,547 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:57:15,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-02-14 15:57:15,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:57:15,748 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:57:15,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:57:15,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1166265850, now seen corresponding path program 113 times [2022-02-14 15:57:15,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:57:15,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810709428] [2022-02-14 15:57:15,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:57:15,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:57:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:16,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:57:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:16,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:57:16,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:16,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:57:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:16,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:57:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:16,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:57:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:16,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:57:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:16,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:57:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:16,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:57:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:16,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:57:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:16,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 15:57:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:16,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 15:57:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:16,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-02-14 15:57:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:16,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-14 15:57:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:16,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-02-14 15:57:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:16,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-14 15:57:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:16,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:57:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:16,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-02-14 15:57:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 378 proven. 118 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:57:16,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:57:16,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810709428] [2022-02-14 15:57:16,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810709428] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:57:16,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276275943] [2022-02-14 15:57:16,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:57:16,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:57:16,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:57:16,176 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:57:16,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-02-14 15:57:16,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-02-14 15:57:16,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:57:16,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 15:57:16,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:57:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 424 proven. 72 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:57:17,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:57:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 424 proven. 72 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:57:17,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276275943] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:57:17,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:57:17,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 70 [2022-02-14 15:57:17,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599439270] [2022-02-14 15:57:17,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:57:17,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-14 15:57:17,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:57:17,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-14 15:57:17,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=807, Invalid=4023, Unknown=0, NotChecked=0, Total=4830 [2022-02-14 15:57:17,514 INFO L87 Difference]: Start difference. First operand 181 states and 200 transitions. Second operand has 70 states, 70 states have (on average 1.6857142857142857) internal successors, (118), 69 states have internal predecessors, (118), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:57:26,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:57:26,725 INFO L93 Difference]: Finished difference Result 810 states and 1008 transitions. [2022-02-14 15:57:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-02-14 15:57:26,725 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.6857142857142857) internal successors, (118), 69 states have internal predecessors, (118), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-02-14 15:57:26,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:57:26,726 INFO L225 Difference]: With dead ends: 810 [2022-02-14 15:57:26,727 INFO L226 Difference]: Without dead ends: 751 [2022-02-14 15:57:26,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12936 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6050, Invalid=28732, Unknown=0, NotChecked=0, Total=34782 [2022-02-14 15:57:26,728 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 193 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-14 15:57:26,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 141 Invalid, 2493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 2012 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-14 15:57:26,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-02-14 15:57:27,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 181. [2022-02-14 15:57:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 144 states have internal predecessors, (163), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:57:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 200 transitions. [2022-02-14 15:57:27,518 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 200 transitions. Word has length 145 [2022-02-14 15:57:27,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:57:27,518 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 200 transitions. [2022-02-14 15:57:27,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.6857142857142857) internal successors, (118), 69 states have internal predecessors, (118), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:57:27,518 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 200 transitions. [2022-02-14 15:57:27,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-14 15:57:27,519 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:57:27,519 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:57:27,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-02-14 15:57:27,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:57:27,719 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:57:27,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:57:27,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1272880293, now seen corresponding path program 114 times [2022-02-14 15:57:27,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:57:27,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860130402] [2022-02-14 15:57:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:57:27,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:57:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:28,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:57:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:28,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:57:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:28,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:57:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:28,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:57:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:28,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:57:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:28,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:57:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:28,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:57:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:28,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:57:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:28,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:57:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:28,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 15:57:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:28,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 15:57:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:28,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-02-14 15:57:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:28,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-14 15:57:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:28,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-02-14 15:57:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:28,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-14 15:57:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:28,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:57:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:28,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-02-14 15:57:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 378 proven. 119 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:57:28,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:57:28,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860130402] [2022-02-14 15:57:28,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860130402] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:57:28,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947164310] [2022-02-14 15:57:28,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:57:28,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:57:28,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:57:28,149 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:57:28,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-02-14 15:57:28,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-02-14 15:57:28,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:57:28,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 15:57:28,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:57:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 424 proven. 73 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:57:29,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:57:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 424 proven. 73 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:57:29,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947164310] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:57:29,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:57:29,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 71 [2022-02-14 15:57:29,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160628224] [2022-02-14 15:57:29,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:57:29,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-14 15:57:29,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:57:29,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-14 15:57:29,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=831, Invalid=4139, Unknown=0, NotChecked=0, Total=4970 [2022-02-14 15:57:29,502 INFO L87 Difference]: Start difference. First operand 181 states and 200 transitions. Second operand has 71 states, 71 states have (on average 1.676056338028169) internal successors, (119), 70 states have internal predecessors, (119), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:57:38,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:57:38,195 INFO L93 Difference]: Finished difference Result 751 states and 931 transitions. [2022-02-14 15:57:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-14 15:57:38,196 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.676056338028169) internal successors, (119), 70 states have internal predecessors, (119), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-02-14 15:57:38,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:57:38,197 INFO L225 Difference]: With dead ends: 751 [2022-02-14 15:57:38,197 INFO L226 Difference]: Without dead ends: 692 [2022-02-14 15:57:38,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12573 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5911, Invalid=28129, Unknown=0, NotChecked=0, Total=34040 [2022-02-14 15:57:38,198 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 153 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 15:57:38,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 153 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 1845 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 15:57:38,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-02-14 15:57:39,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 181. [2022-02-14 15:57:39,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 144 states have internal predecessors, (163), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:57:39,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 200 transitions. [2022-02-14 15:57:39,003 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 200 transitions. Word has length 145 [2022-02-14 15:57:39,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:57:39,003 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 200 transitions. [2022-02-14 15:57:39,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.676056338028169) internal successors, (119), 70 states have internal predecessors, (119), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:57:39,003 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 200 transitions. [2022-02-14 15:57:39,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-14 15:57:39,003 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:57:39,004 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:57:39,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-02-14 15:57:39,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:57:39,204 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:57:39,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:57:39,204 INFO L85 PathProgramCache]: Analyzing trace with hash -423000602, now seen corresponding path program 115 times [2022-02-14 15:57:39,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:57:39,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676799507] [2022-02-14 15:57:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:57:39,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:57:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:57:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:57:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:57:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:57:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:57:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:57:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:57:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:57:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:57:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 15:57:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 15:57:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-02-14 15:57:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-14 15:57:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-02-14 15:57:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-14 15:57:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:57:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-02-14 15:57:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 378 proven. 122 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:57:39,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:57:39,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676799507] [2022-02-14 15:57:39,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676799507] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:57:39,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047278359] [2022-02-14 15:57:39,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 15:57:39,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:57:39,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:57:39,638 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:57:39,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-02-14 15:57:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:39,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 15:57:39,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:57:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 424 proven. 76 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:57:40,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:57:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 424 proven. 76 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:57:41,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047278359] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:57:41,006 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:57:41,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 72 [2022-02-14 15:57:41,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260877039] [2022-02-14 15:57:41,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:57:41,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-14 15:57:41,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:57:41,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-14 15:57:41,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=859, Invalid=4253, Unknown=0, NotChecked=0, Total=5112 [2022-02-14 15:57:41,007 INFO L87 Difference]: Start difference. First operand 181 states and 200 transitions. Second operand has 72 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 71 states have internal predecessors, (120), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:57:49,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:57:49,309 INFO L93 Difference]: Finished difference Result 691 states and 853 transitions. [2022-02-14 15:57:49,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-02-14 15:57:49,310 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 71 states have internal predecessors, (120), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-02-14 15:57:49,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:57:49,311 INFO L225 Difference]: With dead ends: 691 [2022-02-14 15:57:49,311 INFO L226 Difference]: Without dead ends: 632 [2022-02-14 15:57:49,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11931 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5641, Invalid=26939, Unknown=0, NotChecked=0, Total=32580 [2022-02-14 15:57:49,312 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 141 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2062 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 2062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-14 15:57:49,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 153 Invalid, 2424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 2062 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-14 15:57:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-02-14 15:57:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 181. [2022-02-14 15:57:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 144 states have internal predecessors, (163), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:57:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 200 transitions. [2022-02-14 15:57:50,129 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 200 transitions. Word has length 145 [2022-02-14 15:57:50,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:57:50,129 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 200 transitions. [2022-02-14 15:57:50,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 71 states have internal predecessors, (120), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:57:50,129 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 200 transitions. [2022-02-14 15:57:50,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-14 15:57:50,129 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:57:50,129 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:57:50,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-02-14 15:57:50,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:57:50,330 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:57:50,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:57:50,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1455700795, now seen corresponding path program 116 times [2022-02-14 15:57:50,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:57:50,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753598240] [2022-02-14 15:57:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:57:50,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:57:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:50,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:57:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:50,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:57:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:50,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:57:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:50,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:57:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:50,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:57:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:50,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:57:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:50,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:57:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:50,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:57:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:50,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:57:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:50,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 15:57:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:50,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 15:57:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:50,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-02-14 15:57:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:50,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-14 15:57:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:50,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-02-14 15:57:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:50,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-14 15:57:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:50,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:57:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:50,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-02-14 15:57:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:57:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 378 proven. 127 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:57:50,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:57:50,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753598240] [2022-02-14 15:57:50,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753598240] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:57:50,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050290517] [2022-02-14 15:57:50,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:57:50,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:57:50,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:57:50,774 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:57:50,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-02-14 15:57:50,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:57:50,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:57:50,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 15:57:50,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:57:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 424 proven. 81 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:57:51,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:57:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 424 proven. 81 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:57:52,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050290517] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:57:52,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:57:52,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 73 [2022-02-14 15:57:52,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788042200] [2022-02-14 15:57:52,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:57:52,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-14 15:57:52,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:57:52,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-14 15:57:52,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=4365, Unknown=0, NotChecked=0, Total=5256 [2022-02-14 15:57:52,158 INFO L87 Difference]: Start difference. First operand 181 states and 200 transitions. Second operand has 73 states, 73 states have (on average 1.6575342465753424) internal successors, (121), 72 states have internal predecessors, (121), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:57:59,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:57:59,820 INFO L93 Difference]: Finished difference Result 630 states and 774 transitions. [2022-02-14 15:57:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-14 15:57:59,821 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.6575342465753424) internal successors, (121), 72 states have internal predecessors, (121), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-02-14 15:57:59,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:57:59,822 INFO L225 Difference]: With dead ends: 630 [2022-02-14 15:57:59,822 INFO L226 Difference]: Without dead ends: 571 [2022-02-14 15:57:59,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11035 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5252, Invalid=25198, Unknown=0, NotChecked=0, Total=30450 [2022-02-14 15:57:59,823 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 141 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:57:59,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 131 Invalid, 1969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:57:59,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-02-14 15:58:00,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 181. [2022-02-14 15:58:00,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 144 states have internal predecessors, (163), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:58:00,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 200 transitions. [2022-02-14 15:58:00,654 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 200 transitions. Word has length 145 [2022-02-14 15:58:00,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:58:00,654 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 200 transitions. [2022-02-14 15:58:00,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.6575342465753424) internal successors, (121), 72 states have internal predecessors, (121), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:58:00,654 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 200 transitions. [2022-02-14 15:58:00,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-14 15:58:00,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:58:00,654 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:58:00,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-02-14 15:58:00,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:58:00,855 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:58:00,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:58:00,855 INFO L85 PathProgramCache]: Analyzing trace with hash 890331590, now seen corresponding path program 117 times [2022-02-14 15:58:00,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:58:00,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757295640] [2022-02-14 15:58:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:58:00,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:58:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:01,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:58:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:01,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:58:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:01,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:58:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:01,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:58:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:01,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:58:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:01,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:58:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:01,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:58:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:01,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:58:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:01,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:58:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:01,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 15:58:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:01,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 15:58:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:01,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-02-14 15:58:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:01,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-14 15:58:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:01,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-02-14 15:58:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:01,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-14 15:58:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:01,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:58:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:01,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-02-14 15:58:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 378 proven. 134 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:58:01,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:58:01,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757295640] [2022-02-14 15:58:01,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757295640] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:58:01,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142606009] [2022-02-14 15:58:01,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:58:01,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:58:01,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:58:01,294 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:58:01,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-02-14 15:58:01,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-02-14 15:58:01,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:58:01,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 15:58:01,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:58:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 424 proven. 88 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:58:02,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:58:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 424 proven. 88 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:58:02,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142606009] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:58:02,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:58:02,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 74 [2022-02-14 15:58:02,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354703668] [2022-02-14 15:58:02,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:58:02,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-14 15:58:02,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:58:02,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-14 15:58:02,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=4475, Unknown=0, NotChecked=0, Total=5402 [2022-02-14 15:58:02,699 INFO L87 Difference]: Start difference. First operand 181 states and 200 transitions. Second operand has 74 states, 74 states have (on average 1.6486486486486487) internal successors, (122), 73 states have internal predecessors, (122), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:58:09,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:58:09,392 INFO L93 Difference]: Finished difference Result 568 states and 694 transitions. [2022-02-14 15:58:09,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-14 15:58:09,392 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.6486486486486487) internal successors, (122), 73 states have internal predecessors, (122), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-02-14 15:58:09,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:58:09,393 INFO L225 Difference]: With dead ends: 568 [2022-02-14 15:58:09,393 INFO L226 Difference]: Without dead ends: 509 [2022-02-14 15:58:09,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9922 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4762, Invalid=22960, Unknown=0, NotChecked=0, Total=27722 [2022-02-14 15:58:09,394 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 132 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 15:58:09,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 99 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 15:58:09,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-02-14 15:58:10,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 181. [2022-02-14 15:58:10,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 144 states have internal predecessors, (163), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:58:10,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 200 transitions. [2022-02-14 15:58:10,278 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 200 transitions. Word has length 145 [2022-02-14 15:58:10,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:58:10,278 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 200 transitions. [2022-02-14 15:58:10,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.6486486486486487) internal successors, (122), 73 states have internal predecessors, (122), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:58:10,278 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 200 transitions. [2022-02-14 15:58:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-14 15:58:10,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:58:10,279 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:58:10,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-02-14 15:58:10,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2022-02-14 15:58:10,484 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:58:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:58:10,484 INFO L85 PathProgramCache]: Analyzing trace with hash 602891493, now seen corresponding path program 118 times [2022-02-14 15:58:10,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:58:10,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230444913] [2022-02-14 15:58:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:58:10,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:58:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:10,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:58:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:10,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:58:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:10,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:58:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:10,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:58:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:10,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:58:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:10,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:58:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:10,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:58:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:10,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:58:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:10,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:58:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:10,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 15:58:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:10,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 15:58:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:10,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-02-14 15:58:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:10,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-14 15:58:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:10,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-02-14 15:58:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:10,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-14 15:58:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:10,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:58:10,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:10,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-02-14 15:58:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 378 proven. 143 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:58:10,931 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:58:10,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230444913] [2022-02-14 15:58:10,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230444913] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:58:10,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023990166] [2022-02-14 15:58:10,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:58:10,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:58:10,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:58:10,932 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:58:10,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-02-14 15:58:10,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:58:10,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:58:10,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 15:58:10,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:58:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 424 proven. 97 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:58:12,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:58:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 424 proven. 97 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:58:12,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023990166] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:58:12,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:58:12,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 75 [2022-02-14 15:58:12,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794710776] [2022-02-14 15:58:12,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:58:12,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-14 15:58:12,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:58:12,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-14 15:58:12,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=967, Invalid=4583, Unknown=0, NotChecked=0, Total=5550 [2022-02-14 15:58:12,341 INFO L87 Difference]: Start difference. First operand 181 states and 200 transitions. Second operand has 75 states, 75 states have (on average 1.64) internal successors, (123), 74 states have internal predecessors, (123), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:58:18,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:58:18,498 INFO L93 Difference]: Finished difference Result 505 states and 613 transitions. [2022-02-14 15:58:18,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-14 15:58:18,498 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.64) internal successors, (123), 74 states have internal predecessors, (123), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-02-14 15:58:18,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:58:18,499 INFO L225 Difference]: With dead ends: 505 [2022-02-14 15:58:18,499 INFO L226 Difference]: Without dead ends: 446 [2022-02-14 15:58:18,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8641 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4195, Invalid=20297, Unknown=0, NotChecked=0, Total=24492 [2022-02-14 15:58:18,500 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 100 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1766 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:58:18,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 138 Invalid, 2022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1766 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:58:18,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-02-14 15:58:19,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 181. [2022-02-14 15:58:19,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 144 states have internal predecessors, (163), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:58:19,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 200 transitions. [2022-02-14 15:58:19,410 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 200 transitions. Word has length 145 [2022-02-14 15:58:19,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:58:19,411 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 200 transitions. [2022-02-14 15:58:19,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.64) internal successors, (123), 74 states have internal predecessors, (123), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:58:19,411 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 200 transitions. [2022-02-14 15:58:19,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-14 15:58:19,411 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:58:19,411 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:58:19,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-02-14 15:58:19,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-02-14 15:58:19,612 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:58:19,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:58:19,612 INFO L85 PathProgramCache]: Analyzing trace with hash 282183078, now seen corresponding path program 119 times [2022-02-14 15:58:19,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:58:19,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964420996] [2022-02-14 15:58:19,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:58:19,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:58:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:20,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:58:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:20,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:58:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:20,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:58:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:20,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:58:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:20,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:58:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:20,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:58:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:20,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:58:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:20,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:58:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:20,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:58:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:20,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 15:58:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:20,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 15:58:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:20,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-02-14 15:58:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:20,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-14 15:58:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:20,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-02-14 15:58:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:20,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-14 15:58:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:20,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:58:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:20,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-02-14 15:58:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 378 proven. 154 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:58:20,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:58:20,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964420996] [2022-02-14 15:58:20,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964420996] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:58:20,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919824464] [2022-02-14 15:58:20,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:58:20,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:58:20,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:58:20,059 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:58:20,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-02-14 15:58:20,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-02-14 15:58:20,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:58:20,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 15:58:20,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:58:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 424 proven. 108 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:58:21,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:58:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 424 proven. 108 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:58:21,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919824464] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:58:21,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:58:21,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 76 [2022-02-14 15:58:21,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540467283] [2022-02-14 15:58:21,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:58:21,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-14 15:58:21,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:58:21,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-14 15:58:21,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=4689, Unknown=0, NotChecked=0, Total=5700 [2022-02-14 15:58:21,505 INFO L87 Difference]: Start difference. First operand 181 states and 200 transitions. Second operand has 76 states, 76 states have (on average 1.631578947368421) internal successors, (124), 75 states have internal predecessors, (124), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:58:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:58:26,656 INFO L93 Difference]: Finished difference Result 441 states and 531 transitions. [2022-02-14 15:58:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-14 15:58:26,656 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.631578947368421) internal successors, (124), 75 states have internal predecessors, (124), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-02-14 15:58:26,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:58:26,657 INFO L225 Difference]: With dead ends: 441 [2022-02-14 15:58:26,657 INFO L226 Difference]: Without dead ends: 382 [2022-02-14 15:58:26,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7253 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3581, Invalid=17299, Unknown=0, NotChecked=0, Total=20880 [2022-02-14 15:58:26,658 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 83 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:58:26,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 131 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 1520 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:58:26,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-02-14 15:58:27,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 181. [2022-02-14 15:58:27,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 144 states have internal predecessors, (163), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:58:27,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 200 transitions. [2022-02-14 15:58:27,570 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 200 transitions. Word has length 145 [2022-02-14 15:58:27,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:58:27,570 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 200 transitions. [2022-02-14 15:58:27,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.631578947368421) internal successors, (124), 75 states have internal predecessors, (124), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:58:27,570 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 200 transitions. [2022-02-14 15:58:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-14 15:58:27,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:58:27,571 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:58:27,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-02-14 15:58:27,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-02-14 15:58:27,771 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:58:27,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:58:27,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1069843195, now seen corresponding path program 120 times [2022-02-14 15:58:27,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:58:27,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774759235] [2022-02-14 15:58:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:58:27,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:58:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:28,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:58:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:28,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:58:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:28,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:58:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:28,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:58:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:28,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:58:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:28,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:58:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:28,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:58:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:28,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:58:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:28,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:58:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:28,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 15:58:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:28,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 15:58:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:28,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-02-14 15:58:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:28,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-14 15:58:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:28,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-02-14 15:58:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:28,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-14 15:58:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:28,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:58:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:28,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-02-14 15:58:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 378 proven. 167 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:58:28,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:58:28,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774759235] [2022-02-14 15:58:28,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774759235] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:58:28,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390639720] [2022-02-14 15:58:28,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:58:28,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:58:28,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:58:28,233 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:58:28,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-02-14 15:58:28,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-02-14 15:58:28,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:58:28,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 15:58:28,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:58:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 424 proven. 121 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:58:29,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:58:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 424 proven. 121 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:58:29,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390639720] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:58:29,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:58:29,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 77 [2022-02-14 15:58:29,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552151638] [2022-02-14 15:58:29,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:58:29,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-14 15:58:29,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:58:29,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-14 15:58:29,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1059, Invalid=4793, Unknown=0, NotChecked=0, Total=5852 [2022-02-14 15:58:29,701 INFO L87 Difference]: Start difference. First operand 181 states and 200 transitions. Second operand has 77 states, 77 states have (on average 1.6233766233766234) internal successors, (125), 76 states have internal predecessors, (125), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:58:33,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:58:33,808 INFO L93 Difference]: Finished difference Result 376 states and 448 transitions. [2022-02-14 15:58:33,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-14 15:58:33,809 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.6233766233766234) internal successors, (125), 76 states have internal predecessors, (125), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-02-14 15:58:33,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:58:33,809 INFO L225 Difference]: With dead ends: 376 [2022-02-14 15:58:33,809 INFO L226 Difference]: Without dead ends: 317 [2022-02-14 15:58:33,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5813 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2956, Invalid=14074, Unknown=0, NotChecked=0, Total=17030 [2022-02-14 15:58:33,810 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 73 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:58:33,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 93 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:58:33,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-02-14 15:58:34,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 181. [2022-02-14 15:58:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 144 states have internal predecessors, (163), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:58:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 200 transitions. [2022-02-14 15:58:34,736 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 200 transitions. Word has length 145 [2022-02-14 15:58:34,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:58:34,736 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 200 transitions. [2022-02-14 15:58:34,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.6233766233766234) internal successors, (125), 76 states have internal predecessors, (125), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:58:34,736 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 200 transitions. [2022-02-14 15:58:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-14 15:58:34,736 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:58:34,736 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:58:34,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-02-14 15:58:34,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-02-14 15:58:34,937 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:58:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:58:34,937 INFO L85 PathProgramCache]: Analyzing trace with hash -32984698, now seen corresponding path program 16 times [2022-02-14 15:58:34,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:58:34,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276956078] [2022-02-14 15:58:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:58:34,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:58:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:35,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:58:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:35,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-14 15:58:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:35,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-14 15:58:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:35,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 15:58:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:35,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-14 15:58:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:35,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:58:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:35,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 15:58:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:35,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:58:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:35,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 15:58:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:35,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-14 15:58:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:35,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-14 15:58:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:35,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-02-14 15:58:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:35,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-14 15:58:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:35,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-02-14 15:58:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:35,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-14 15:58:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:35,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:58:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:35,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-02-14 15:58:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 378 proven. 182 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:58:35,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:58:35,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276956078] [2022-02-14 15:58:35,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276956078] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:58:35,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022233557] [2022-02-14 15:58:35,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:58:35,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:58:35,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:58:35,406 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:58:35,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-02-14 15:58:35,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:58:35,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:58:35,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 15:58:35,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:58:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 424 proven. 136 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:58:36,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:58:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 424 proven. 136 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:58:36,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022233557] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:58:36,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:58:36,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-02-14 15:58:36,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053148532] [2022-02-14 15:58:36,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:58:36,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-14 15:58:36,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:58:36,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-14 15:58:36,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1111, Invalid=4895, Unknown=0, NotChecked=0, Total=6006 [2022-02-14 15:58:36,940 INFO L87 Difference]: Start difference. First operand 181 states and 200 transitions. Second operand has 78 states, 78 states have (on average 1.6153846153846154) internal successors, (126), 77 states have internal predecessors, (126), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:58:39,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:58:39,958 INFO L93 Difference]: Finished difference Result 310 states and 364 transitions. [2022-02-14 15:58:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-14 15:58:39,958 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.6153846153846154) internal successors, (126), 77 states have internal predecessors, (126), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-02-14 15:58:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:58:39,958 INFO L225 Difference]: With dead ends: 310 [2022-02-14 15:58:39,958 INFO L226 Difference]: Without dead ends: 251 [2022-02-14 15:58:39,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4425 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2380, Invalid=10730, Unknown=0, NotChecked=0, Total=13110 [2022-02-14 15:58:39,959 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 48 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 15:58:39,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 94 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 15:58:39,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-02-14 15:58:40,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 183. [2022-02-14 15:58:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 146 states have internal predecessors, (165), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 15:58:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 202 transitions. [2022-02-14 15:58:40,937 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 202 transitions. Word has length 145 [2022-02-14 15:58:40,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:58:40,937 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 202 transitions. [2022-02-14 15:58:40,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.6153846153846154) internal successors, (126), 77 states have internal predecessors, (126), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 15:58:40,937 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 202 transitions. [2022-02-14 15:58:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-02-14 15:58:40,937 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:58:40,937 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:58:40,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-02-14 15:58:41,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-02-14 15:58:41,138 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:58:41,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:58:41,138 INFO L85 PathProgramCache]: Analyzing trace with hash 842348932, now seen corresponding path program 32 times [2022-02-14 15:58:41,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:58:41,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796924380] [2022-02-14 15:58:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:58:41,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:58:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:41,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:58:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:41,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 15:58:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:41,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 15:58:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:41,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-14 15:58:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:41,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-14 15:58:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:41,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-14 15:58:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:41,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-14 15:58:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:41,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-02-14 15:58:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:41,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 15:58:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:41,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-14 15:58:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:41,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-14 15:58:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:41,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-02-14 15:58:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:41,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-02-14 15:58:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:41,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-02-14 15:58:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:41,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-02-14 15:58:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:41,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-02-14 15:58:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:41,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-02-14 15:58:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 168 proven. 409 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:58:41,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:58:41,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796924380] [2022-02-14 15:58:41,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796924380] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:58:41,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813720945] [2022-02-14 15:58:41,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:58:41,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:58:41,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:58:41,347 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:58:41,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-02-14 15:58:41,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:58:41,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:58:41,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-14 15:58:41,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:58:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 185 proven. 392 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:58:41,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:58:41,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 185 proven. 392 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 15:58:41,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813720945] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:58:41,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:58:41,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 26 [2022-02-14 15:58:41,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228009631] [2022-02-14 15:58:41,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:58:41,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-14 15:58:41,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:58:41,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-14 15:58:41,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2022-02-14 15:58:41,829 INFO L87 Difference]: Start difference. First operand 183 states and 202 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 23 states have internal predecessors, (72), 18 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:58:43,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:58:43,285 INFO L93 Difference]: Finished difference Result 196 states and 216 transitions. [2022-02-14 15:58:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-14 15:58:43,286 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 23 states have internal predecessors, (72), 18 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 146 [2022-02-14 15:58:43,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:58:43,286 INFO L225 Difference]: With dead ends: 196 [2022-02-14 15:58:43,286 INFO L226 Difference]: Without dead ends: 194 [2022-02-14 15:58:43,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 338 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=607, Invalid=1649, Unknown=0, NotChecked=0, Total=2256 [2022-02-14 15:58:43,286 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 107 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 15:58:43,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 83 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 15:58:43,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-14 15:58:44,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 190. [2022-02-14 15:58:44,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 150 states have (on average 1.1333333333333333) internal successors, (170), 151 states have internal predecessors, (170), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-14 15:58:44,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 209 transitions. [2022-02-14 15:58:44,286 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 209 transitions. Word has length 146 [2022-02-14 15:58:44,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:58:44,286 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 209 transitions. [2022-02-14 15:58:44,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 23 states have internal predecessors, (72), 18 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 15:58:44,286 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 209 transitions. [2022-02-14 15:58:44,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-02-14 15:58:44,287 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:58:44,287 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:58:44,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-02-14 15:58:44,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:58:44,487 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:58:44,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:58:44,487 INFO L85 PathProgramCache]: Analyzing trace with hash -747058525, now seen corresponding path program 33 times [2022-02-14 15:58:44,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:58:44,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705151343] [2022-02-14 15:58:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:58:44,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:58:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:58:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-14 15:58:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 15:58:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-14 15:58:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-14 15:58:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-14 15:58:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-14 15:58:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-02-14 15:58:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 15:58:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-14 15:58:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-14 15:58:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-02-14 15:58:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-02-14 15:58:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-02-14 15:58:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-02-14 15:58:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-02-14 15:58:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-02-14 15:58:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-02-14 15:58:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:58:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 427 proven. 202 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-02-14 15:58:44,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:58:44,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705151343] [2022-02-14 15:58:44,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705151343] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:58:44,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428361301] [2022-02-14 15:58:44,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:58:44,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:58:44,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:58:44,988 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 15:58:44,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-02-14 15:58:45,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-02-14 15:58:45,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:58:45,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2022-02-14 15:58:45,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:58:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 476 proven. 153 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-02-14 15:58:45,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:58:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 476 proven. 153 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-02-14 15:58:46,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428361301] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:58:46,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:58:46,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 65 [2022-02-14 15:58:46,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889938697] [2022-02-14 15:58:46,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:58:46,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-14 15:58:46,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:58:46,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-14 15:58:46,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=838, Invalid=3322, Unknown=0, NotChecked=0, Total=4160 [2022-02-14 15:58:46,244 INFO L87 Difference]: Start difference. First operand 190 states and 209 transitions. Second operand has 65 states, 65 states have (on average 1.7692307692307692) internal successors, (115), 64 states have internal predecessors, (115), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36)