/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/array-examples/standard_strcpy_original-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 21:29:24,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 21:29:24,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 21:29:24,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 21:29:24,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-30 21:29:24,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-30 21:29:24,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-30 21:29:24,651 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 [2022-01-30 21:29:24,690 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 21:29:24,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 21:29:24,691 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 21:29:24,691 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 21:29:24,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 21:29:24,692 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 21:29:24,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 21:29:24,693 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 21:29:24,693 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 21:29:24,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 21:29:24,693 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 21:29:24,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 21:29:24,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 21:29:24,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 21:29:24,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 21:29:24,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 21:29:24,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 21:29:24,694 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 21:29:24,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 21:29:24,694 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 21:29:24,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 21:29:24,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 21:29:24,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 21:29:24,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 21:29:24,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 21:29:24,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 21:29:24,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 21:29:24,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 21:29:24,699 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 21:29:24,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 21:29:24,699 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 21:29:24,699 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 21:29:24,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 21:29:24,700 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 21:29:24,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 21:29:24,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 21:29:24,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 21:29:24,970 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 21:29:24,970 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 21:29:24,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcpy_original-2.i [2022-01-30 21:29:25,030 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99a8d2e2a/01c49b04783a4a209c2be5298b86c693/FLAG16d0302d6 [2022-01-30 21:29:25,530 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 21:29:25,531 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_strcpy_original-2.i [2022-01-30 21:29:25,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99a8d2e2a/01c49b04783a4a209c2be5298b86c693/FLAG16d0302d6 [2022-01-30 21:29:26,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99a8d2e2a/01c49b04783a4a209c2be5298b86c693 [2022-01-30 21:29:26,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 21:29:26,010 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 21:29:26,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 21:29:26,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 21:29:26,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 21:29:26,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 09:29:26" (1/1) ... [2022-01-30 21:29:26,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd3cbf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:29:26, skipping insertion in model container [2022-01-30 21:29:26,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 09:29:26" (1/1) ... [2022-01-30 21:29:26,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 21:29:26,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 21:29:26,207 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_strcpy_original-2.i[896,909] [2022-01-30 21:29:26,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 21:29:26,223 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 21:29:26,233 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_strcpy_original-2.i[896,909] [2022-01-30 21:29:26,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 21:29:26,250 INFO L208 MainTranslator]: Completed translation [2022-01-30 21:29:26,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:29:26 WrapperNode [2022-01-30 21:29:26,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 21:29:26,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 21:29:26,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 21:29:26,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 21:29:26,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:29:26" (1/1) ... [2022-01-30 21:29:26,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:29:26" (1/1) ... [2022-01-30 21:29:26,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:29:26" (1/1) ... [2022-01-30 21:29:26,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:29:26" (1/1) ... [2022-01-30 21:29:26,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:29:26" (1/1) ... [2022-01-30 21:29:26,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:29:26" (1/1) ... [2022-01-30 21:29:26,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:29:26" (1/1) ... [2022-01-30 21:29:26,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 21:29:26,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 21:29:26,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 21:29:26,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 21:29:26,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:29:26" (1/1) ... [2022-01-30 21:29:26,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 21:29:26,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:29:26,317 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-30 21:29:26,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-30 21:29:26,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 21:29:26,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 21:29:26,363 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 21:29:26,363 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 21:29:26,364 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 21:29:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 21:29:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 21:29:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 21:29:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 21:29:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 21:29:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 21:29:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 21:29:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 21:29:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 21:29:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 21:29:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 21:29:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 21:29:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 21:29:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 21:29:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 21:29:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 21:29:26,463 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 21:29:26,465 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 21:29:26,692 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 21:29:26,697 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 21:29:26,697 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-30 21:29:26,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 09:29:26 BoogieIcfgContainer [2022-01-30 21:29:26,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 21:29:26,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 21:29:26,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 21:29:26,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 21:29:26,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 09:29:26" (1/3) ... [2022-01-30 21:29:26,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5805eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 09:29:26, skipping insertion in model container [2022-01-30 21:29:26,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:29:26" (2/3) ... [2022-01-30 21:29:26,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5805eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 09:29:26, skipping insertion in model container [2022-01-30 21:29:26,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 09:29:26" (3/3) ... [2022-01-30 21:29:26,716 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-2.i [2022-01-30 21:29:26,726 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 21:29:26,727 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 21:29:26,809 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 21:29:26,815 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 [2022-01-30 21:29:26,815 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 21:29:26,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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) [2022-01-30 21:29:26,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-30 21:29:26,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:29:26,853 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:29:26,855 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:29:26,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:29:26,864 INFO L85 PathProgramCache]: Analyzing trace with hash -780357206, now seen corresponding path program 1 times [2022-01-30 21:29:26,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:29:26,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810180212] [2022-01-30 21:29:26,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:29:26,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:29:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:27,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:29:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:29:27,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:29:27,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810180212] [2022-01-30 21:29:27,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810180212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:29:27,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:29:27,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 21:29:27,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409157720] [2022-01-30 21:29:27,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:29:27,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 21:29:27,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:29:27,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 21:29:27,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 21:29:27,136 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-01-30 21:29:27,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:29:27,187 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-01-30 21:29:27,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 21:29:27,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 16 [2022-01-30 21:29:27,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:29:27,198 INFO L225 Difference]: With dead ends: 47 [2022-01-30 21:29:27,199 INFO L226 Difference]: Without dead ends: 22 [2022-01-30 21:29:27,202 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 [2022-01-30 21:29:27,206 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 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 [2022-01-30 21:29:27,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:29:27,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-30 21:29:27,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-30 21:29:27,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2022-01-30 21:29:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-01-30 21:29:27,244 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2022-01-30 21:29:27,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:29:27,245 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-01-30 21:29:27,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-01-30 21:29:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-01-30 21:29:27,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-30 21:29:27,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:29:27,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:29:27,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 21:29:27,249 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:29:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:29:27,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1539042215, now seen corresponding path program 1 times [2022-01-30 21:29:27,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:29:27,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405305708] [2022-01-30 21:29:27,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:29:27,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:29:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:27,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:29:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:29:27,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:29:27,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405305708] [2022-01-30 21:29:27,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405305708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:29:27,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:29:27,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 21:29:27,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696980379] [2022-01-30 21:29:27,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:29:27,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 21:29:27,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:29:27,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 21:29:27,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 21:29:27,378 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-01-30 21:29:27,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:29:27,444 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-01-30 21:29:27,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 21:29:27,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 18 [2022-01-30 21:29:27,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:29:27,447 INFO L225 Difference]: With dead ends: 38 [2022-01-30 21:29:27,447 INFO L226 Difference]: Without dead ends: 23 [2022-01-30 21:29:27,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-30 21:29:27,452 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:29:27,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 31 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:29:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-30 21:29:27,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-30 21:29:27,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2022-01-30 21:29:27,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-01-30 21:29:27,470 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 18 [2022-01-30 21:29:27,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:29:27,474 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-01-30 21:29:27,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-01-30 21:29:27,478 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-01-30 21:29:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-30 21:29:27,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:29:27,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:29:27,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-30 21:29:27,479 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:29:27,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:29:27,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1508372149, now seen corresponding path program 1 times [2022-01-30 21:29:27,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:29:27,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771219228] [2022-01-30 21:29:27,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:29:27,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:29:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:27,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:29:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:29:27,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:29:27,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771219228] [2022-01-30 21:29:27,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771219228] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:29:27,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923562771] [2022-01-30 21:29:27,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:29:27,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:29:27,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:29:27,584 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:29:27,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 21:29:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:27,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 21:29:27,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:29:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 21:29:27,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 21:29:27,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923562771] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:29:27,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 21:29:27,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-30 21:29:27,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280805303] [2022-01-30 21:29:27,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:29:27,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 21:29:27,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:29:27,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 21:29:27,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 21:29:27,735 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-01-30 21:29:27,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:29:27,746 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-01-30 21:29:27,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 21:29:27,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 19 [2022-01-30 21:29:27,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:29:27,748 INFO L225 Difference]: With dead ends: 35 [2022-01-30 21:29:27,749 INFO L226 Difference]: Without dead ends: 23 [2022-01-30 21:29:27,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 21:29:27,751 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:29:27,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:29:27,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-30 21:29:27,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-30 21:29:27,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2022-01-30 21:29:27,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-01-30 21:29:27,763 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2022-01-30 21:29:27,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:29:27,764 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-01-30 21:29:27,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-01-30 21:29:27,764 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-01-30 21:29:27,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-30 21:29:27,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:29:27,766 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:29:27,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-30 21:29:27,987 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 [2022-01-30 21:29:27,988 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:29:27,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:29:27,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1565630451, now seen corresponding path program 1 times [2022-01-30 21:29:27,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:29:27,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635858251] [2022-01-30 21:29:27,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:29:27,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:29:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:28,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:29:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:29:28,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:29:28,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635858251] [2022-01-30 21:29:28,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635858251] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:29:28,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878615901] [2022-01-30 21:29:28,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:29:28,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:29:28,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:29:28,065 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:29:28,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 21:29:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:28,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 21:29:28,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:29:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:29:28,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:29:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:29:28,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878615901] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:29:28,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:29:28,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 21:29:28,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744565813] [2022-01-30 21:29:28,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:29:28,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 21:29:28,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:29:28,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 21:29:28,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 21:29:28,240 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:29:28,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:29:28,317 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-01-30 21:29:28,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 21:29:28,318 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-30 21:29:28,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:29:28,319 INFO L225 Difference]: With dead ends: 41 [2022-01-30 21:29:28,319 INFO L226 Difference]: Without dead ends: 26 [2022-01-30 21:29:28,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-30 21:29:28,320 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:29:28,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 35 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:29:28,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-30 21:29:28,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-30 21:29:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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) [2022-01-30 21:29:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-01-30 21:29:28,325 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 19 [2022-01-30 21:29:28,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:29:28,325 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-01-30 21:29:28,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:29:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-01-30 21:29:28,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-30 21:29:28,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:29:28,326 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:29:28,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-30 21:29:28,547 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 [2022-01-30 21:29:28,548 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:29:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:29:28,548 INFO L85 PathProgramCache]: Analyzing trace with hash 553681769, now seen corresponding path program 2 times [2022-01-30 21:29:28,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:29:28,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893546115] [2022-01-30 21:29:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:29:28,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:29:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:28,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:29:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:29:28,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:29:28,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893546115] [2022-01-30 21:29:28,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893546115] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:29:28,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21750093] [2022-01-30 21:29:28,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 21:29:28,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:29:28,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:29:28,663 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:29:28,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 21:29:28,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-30 21:29:28,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:29:28,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-30 21:29:28,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:29:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-30 21:29:28,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 21:29:28,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21750093] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:29:28,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 21:29:28,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-01-30 21:29:28,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183299043] [2022-01-30 21:29:28,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:29:28,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-30 21:29:28,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:29:28,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-30 21:29:28,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-01-30 21:29:28,960 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2022-01-30 21:29:29,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:29:29,051 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-01-30 21:29:29,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-30 21:29:29,052 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 22 [2022-01-30 21:29:29,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:29:29,053 INFO L225 Difference]: With dead ends: 51 [2022-01-30 21:29:29,054 INFO L226 Difference]: Without dead ends: 36 [2022-01-30 21:29:29,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-01-30 21:29:29,055 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:29:29,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 79 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:29:29,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-30 21:29:29,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-01-30 21:29:29,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2022-01-30 21:29:29,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-30 21:29:29,062 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2022-01-30 21:29:29,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:29:29,062 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-30 21:29:29,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2022-01-30 21:29:29,063 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-30 21:29:29,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-30 21:29:29,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:29:29,063 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:29:29,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 21:29:29,278 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 [2022-01-30 21:29:29,279 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:29:29,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:29:29,279 INFO L85 PathProgramCache]: Analyzing trace with hash 160654759, now seen corresponding path program 1 times [2022-01-30 21:29:29,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:29:29,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573817753] [2022-01-30 21:29:29,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:29:29,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:29:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:29,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:29:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-30 21:29:29,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:29:29,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573817753] [2022-01-30 21:29:29,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573817753] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:29:29,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:29:29,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-30 21:29:29,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392519634] [2022-01-30 21:29:29,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:29:29,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-30 21:29:29,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:29:29,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-30 21:29:29,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-30 21:29:29,347 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-01-30 21:29:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:29:29,431 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-01-30 21:29:29,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-30 21:29:29,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 22 [2022-01-30 21:29:29,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:29:29,433 INFO L225 Difference]: With dead ends: 49 [2022-01-30 21:29:29,433 INFO L226 Difference]: Without dead ends: 34 [2022-01-30 21:29:29,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-30 21:29:29,434 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:29:29,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 29 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:29:29,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-30 21:29:29,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-01-30 21:29:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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) [2022-01-30 21:29:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-01-30 21:29:29,439 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2022-01-30 21:29:29,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:29:29,439 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-01-30 21:29:29,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-01-30 21:29:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-01-30 21:29:29,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-30 21:29:29,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:29:29,440 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:29:29,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-30 21:29:29,440 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:29:29,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:29:29,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1646645798, now seen corresponding path program 1 times [2022-01-30 21:29:29,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:29:29,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263048317] [2022-01-30 21:29:29,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:29:29,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:29:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:29,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:29:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 21:29:29,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:29:29,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263048317] [2022-01-30 21:29:29,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263048317] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:29:29,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338010406] [2022-01-30 21:29:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:29:29,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:29:29,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:29:29,498 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:29:29,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 21:29:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:29,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 21:29:29,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:29:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 21:29:29,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:29:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 21:29:29,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338010406] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:29:29,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:29:29,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-30 21:29:29,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670956497] [2022-01-30 21:29:29,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:29:29,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-30 21:29:29,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:29:29,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-30 21:29:29,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-30 21:29:29,822 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:29:30,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:29:30,007 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-01-30 21:29:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-30 21:29:30,008 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-30 21:29:30,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:29:30,008 INFO L225 Difference]: With dead ends: 53 [2022-01-30 21:29:30,008 INFO L226 Difference]: Without dead ends: 35 [2022-01-30 21:29:30,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-01-30 21:29:30,010 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:29:30,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 35 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:29:30,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-30 21:29:30,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-30 21:29:30,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 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) [2022-01-30 21:29:30,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-01-30 21:29:30,014 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 25 [2022-01-30 21:29:30,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:29:30,015 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-01-30 21:29:30,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:29:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-01-30 21:29:30,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-30 21:29:30,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:29:30,016 INFO L514 BasicCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:29:30,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 21:29:30,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:29:30,240 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:29:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:29:30,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1716338778, now seen corresponding path program 2 times [2022-01-30 21:29:30,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:29:30,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864252271] [2022-01-30 21:29:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:29:30,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:29:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:30,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:29:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:30,361 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 21:29:30,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:29:30,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864252271] [2022-01-30 21:29:30,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864252271] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:29:30,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163511534] [2022-01-30 21:29:30,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 21:29:30,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:29:30,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:29:30,363 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:29:30,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 21:29:30,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 21:29:30,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:29:30,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 21:29:30,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:29:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 21:29:30,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:29:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 21:29:30,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163511534] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:29:30,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:29:30,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-30 21:29:30,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159344503] [2022-01-30 21:29:30,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:29:30,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 21:29:30,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:29:30,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 21:29:30,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-30 21:29:30,793 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:29:31,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:29:31,217 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2022-01-30 21:29:31,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 21:29:31,217 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-30 21:29:31,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:29:31,218 INFO L225 Difference]: With dead ends: 65 [2022-01-30 21:29:31,218 INFO L226 Difference]: Without dead ends: 47 [2022-01-30 21:29:31,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-30 21:29:31,220 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:29:31,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 50 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:29:31,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-30 21:29:31,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-01-30 21:29:31,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 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) [2022-01-30 21:29:31,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-01-30 21:29:31,225 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 31 [2022-01-30 21:29:31,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:29:31,226 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-01-30 21:29:31,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:29:31,226 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-01-30 21:29:31,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-30 21:29:31,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:29:31,227 INFO L514 BasicCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:29:31,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-30 21:29:31,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:29:31,428 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:29:31,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:29:31,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1682717350, now seen corresponding path program 3 times [2022-01-30 21:29:31,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:29:31,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217805292] [2022-01-30 21:29:31,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:29:31,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:29:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:31,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:29:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 21:29:31,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:29:31,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217805292] [2022-01-30 21:29:31,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217805292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:29:31,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16094750] [2022-01-30 21:29:31,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 21:29:31,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:29:31,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:29:31,807 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:29:31,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 21:29:31,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-30 21:29:31,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:29:31,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-30 21:29:31,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:29:31,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-30 21:29:32,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2022-01-30 21:29:32,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-01-30 21:29:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-01-30 21:29:32,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:29:32,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-30 21:29:32,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-01-30 21:29:32,603 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-01-30 21:29:32,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2022-01-30 21:29:32,632 INFO L353 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-01-30 21:29:32,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 90 [2022-01-30 21:29:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-01-30 21:29:32,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16094750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:29:32,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:29:32,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 8, 9] total 36 [2022-01-30 21:29:32,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158904173] [2022-01-30 21:29:32,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:29:32,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-30 21:29:32,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:29:32,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-30 21:29:32,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=927, Unknown=0, NotChecked=0, Total=1260 [2022-01-30 21:29:32,958 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:29:33,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:29:33,881 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2022-01-30 21:29:33,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-30 21:29:33,882 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-30 21:29:33,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:29:33,883 INFO L225 Difference]: With dead ends: 75 [2022-01-30 21:29:33,883 INFO L226 Difference]: Without dead ends: 57 [2022-01-30 21:29:33,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1071, Invalid=3089, Unknown=0, NotChecked=0, Total=4160 [2022-01-30 21:29:33,885 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 21:29:33,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 73 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 21:29:33,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-30 21:29:33,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-01-30 21:29:33,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 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) [2022-01-30 21:29:33,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2022-01-30 21:29:33,893 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 43 [2022-01-30 21:29:33,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:29:33,893 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2022-01-30 21:29:33,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:29:33,893 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2022-01-30 21:29:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-30 21:29:33,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:29:33,895 INFO L514 BasicCegarLoop]: trace histogram [23, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:29:33,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 21:29:34,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:29:34,116 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:29:34,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:29:34,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1979158293, now seen corresponding path program 1 times [2022-01-30 21:29:34,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:29:34,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497590178] [2022-01-30 21:29:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:29:34,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:29:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:34,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:29:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:34,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-30 21:29:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 2 proven. 276 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-30 21:29:34,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:29:34,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497590178] [2022-01-30 21:29:34,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497590178] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:29:34,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420628343] [2022-01-30 21:29:34,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:29:34,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:29:34,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:29:34,452 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:29:34,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 21:29:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:34,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-30 21:29:34,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:29:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-30 21:29:34,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:29:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 2 proven. 276 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-30 21:29:35,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420628343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:29:35,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:29:35,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-01-30 21:29:35,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407727543] [2022-01-30 21:29:35,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:29:35,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-30 21:29:35,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:29:35,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-30 21:29:35,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-30 21:29:35,452 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 52 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 51 states have internal predecessors, (72), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 21:29:36,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:29:36,685 INFO L93 Difference]: Finished difference Result 107 states and 137 transitions. [2022-01-30 21:29:36,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-30 21:29:36,686 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 51 states have internal predecessors, (72), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-01-30 21:29:36,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:29:36,688 INFO L225 Difference]: With dead ends: 107 [2022-01-30 21:29:36,688 INFO L226 Difference]: Without dead ends: 81 [2022-01-30 21:29:36,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3726, Invalid=6174, Unknown=0, NotChecked=0, Total=9900 [2022-01-30 21:29:36,693 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 21:29:36,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 55 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 21:29:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-30 21:29:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-01-30 21:29:36,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 74 states have internal predecessors, (77), 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) [2022-01-30 21:29:36,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2022-01-30 21:29:36,706 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 53 [2022-01-30 21:29:36,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:29:36,708 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2022-01-30 21:29:36,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 51 states have internal predecessors, (72), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 21:29:36,708 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2022-01-30 21:29:36,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-30 21:29:36,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:29:36,710 INFO L514 BasicCegarLoop]: trace histogram [48, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:29:36,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-30 21:29:36,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:29:36,928 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:29:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:29:36,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1106673977, now seen corresponding path program 2 times [2022-01-30 21:29:36,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:29:36,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881376690] [2022-01-30 21:29:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:29:36,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:29:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:38,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:29:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:38,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 21:29:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 2 proven. 1176 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-30 21:29:38,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:29:38,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881376690] [2022-01-30 21:29:38,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881376690] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:29:38,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951955077] [2022-01-30 21:29:38,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 21:29:38,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:29:38,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:29:38,024 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:29:38,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 21:29:38,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 21:29:38,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:29:38,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-30 21:29:38,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:29:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-30 21:29:38,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:29:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 2 proven. 1176 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-30 21:29:40,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951955077] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:29:40,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:29:40,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-01-30 21:29:40,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540508004] [2022-01-30 21:29:40,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:29:40,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-30 21:29:40,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:29:40,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-30 21:29:40,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-30 21:29:40,813 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 102 states, 102 states have (on average 1.196078431372549) internal successors, (122), 101 states have internal predecessors, (122), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 21:29:44,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:29:44,416 INFO L93 Difference]: Finished difference Result 157 states and 212 transitions. [2022-01-30 21:29:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-30 21:29:44,417 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.196078431372549) internal successors, (122), 101 states have internal predecessors, (122), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 78 [2022-01-30 21:29:44,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:29:44,418 INFO L225 Difference]: With dead ends: 157 [2022-01-30 21:29:44,418 INFO L226 Difference]: Without dead ends: 131 [2022-01-30 21:29:44,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=14951, Invalid=24849, Unknown=0, NotChecked=0, Total=39800 [2022-01-30 21:29:44,427 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 21:29:44,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 55 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 21:29:44,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-30 21:29:44,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-01-30 21:29:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 123 states have (on average 1.032520325203252) internal successors, (127), 124 states have internal predecessors, (127), 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) [2022-01-30 21:29:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2022-01-30 21:29:44,440 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 78 [2022-01-30 21:29:44,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:29:44,440 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2022-01-30 21:29:44,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.196078431372549) internal successors, (122), 101 states have internal predecessors, (122), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 21:29:44,441 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2022-01-30 21:29:44,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-30 21:29:44,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:29:44,442 INFO L514 BasicCegarLoop]: trace histogram [98, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:29:44,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 21:29:44,655 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,SelfDestructingSolverStorable10 [2022-01-30 21:29:44,656 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:29:44,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:29:44,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1794498375, now seen corresponding path program 3 times [2022-01-30 21:29:44,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:29:44,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465067738] [2022-01-30 21:29:44,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:29:44,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:29:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:48,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:29:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:48,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-01-30 21:29:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:29:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4860 backedges. 2 proven. 4851 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-30 21:29:48,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:29:48,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465067738] [2022-01-30 21:29:48,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465067738] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:29:48,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558034478] [2022-01-30 21:29:48,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 21:29:48,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:29:48,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:29:48,164 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:29:48,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 21:29:48,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-30 21:29:48,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:29:48,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-30 21:29:48,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:29:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4860 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2022-01-30 21:29:48,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:29:53,205 INFO L353 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-01-30 21:29:53,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-01-30 21:29:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4860 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2022-01-30 21:29:53,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558034478] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:29:53,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:29:53,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 10, 9] total 113 [2022-01-30 21:29:53,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422879053] [2022-01-30 21:29:53,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:29:53,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-30 21:29:53,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:29:53,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-30 21:29:53,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5087, Invalid=7567, Unknown=2, NotChecked=0, Total=12656 [2022-01-30 21:29:53,490 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand has 113 states, 113 states have (on average 1.3008849557522124) internal successors, (147), 112 states have internal predecessors, (147), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 21:29:58,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:29:58,840 INFO L93 Difference]: Finished difference Result 181 states and 191 transitions. [2022-01-30 21:29:58,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-30 21:29:58,841 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.3008849557522124) internal successors, (147), 112 states have internal predecessors, (147), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 128 [2022-01-30 21:29:58,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:29:58,845 INFO L225 Difference]: With dead ends: 181 [2022-01-30 21:29:58,845 INFO L226 Difference]: Without dead ends: 141 [2022-01-30 21:29:58,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 248 SyntacticMatches, 2 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7481 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=15468, Invalid=33592, Unknown=2, NotChecked=0, Total=49062 [2022-01-30 21:29:58,852 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 21:29:58,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 77 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 447 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2022-01-30 21:29:58,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-30 21:29:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 135. [2022-01-30 21:29:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 127 states have (on average 1.031496062992126) internal successors, (131), 128 states have internal predecessors, (131), 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) [2022-01-30 21:29:58,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-01-30 21:29:58,874 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 128 [2022-01-30 21:29:58,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:29:58,874 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-01-30 21:29:58,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.3008849557522124) internal successors, (147), 112 states have internal predecessors, (147), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 21:29:58,878 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-01-30 21:29:58,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-30 21:29:58,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:29:58,885 INFO L514 BasicCegarLoop]: trace histogram [99, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:29:58,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-30 21:29:59,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:29:59,100 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:29:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:29:59,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1133885460, now seen corresponding path program 4 times [2022-01-30 21:29:59,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:29:59,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143127597] [2022-01-30 21:29:59,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:29:59,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:29:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:02,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:30:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:02,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-30 21:30:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4965 backedges. 2 proven. 4950 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-30 21:30:02,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:30:02,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143127597] [2022-01-30 21:30:02,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143127597] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:30:02,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089831027] [2022-01-30 21:30:02,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 21:30:02,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:30:02,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:30:02,685 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:30:02,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-30 21:30:02,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 21:30:02,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:30:02,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 101 conjunts are in the unsatisfiable core [2022-01-30 21:30:02,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:30:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4965 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 21:30:03,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:30:12,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4965 backedges. 2 proven. 4950 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-30 21:30:12,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089831027] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:30:12,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:30:12,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 204 [2022-01-30 21:30:12,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972085299] [2022-01-30 21:30:12,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:30:12,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 204 states [2022-01-30 21:30:12,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:30:12,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2022-01-30 21:30:12,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20505, Invalid=20907, Unknown=0, NotChecked=0, Total=41412 [2022-01-30 21:30:12,482 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 204 states, 204 states have (on average 1.0980392156862746) internal successors, (224), 203 states have internal predecessors, (224), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 21:30:25,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:30:25,448 INFO L93 Difference]: Finished difference Result 265 states and 371 transitions. [2022-01-30 21:30:25,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2022-01-30 21:30:25,448 INFO L78 Accepts]: Start accepts. Automaton has has 204 states, 204 states have (on average 1.0980392156862746) internal successors, (224), 203 states have internal predecessors, (224), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 132 [2022-01-30 21:30:25,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:30:25,450 INFO L225 Difference]: With dead ends: 265 [2022-01-30 21:30:25,450 INFO L226 Difference]: Without dead ends: 236 [2022-01-30 21:30:25,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25444 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=61106, Invalid=101706, Unknown=0, NotChecked=0, Total=162812 [2022-01-30 21:30:25,462 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 21:30:25,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 60 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 21:30:25,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-30 21:30:25,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-01-30 21:30:25,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 228 states have (on average 1.0175438596491229) internal successors, (232), 229 states have internal predecessors, (232), 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) [2022-01-30 21:30:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 239 transitions. [2022-01-30 21:30:25,503 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 239 transitions. Word has length 132 [2022-01-30 21:30:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:30:25,503 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 239 transitions. [2022-01-30 21:30:25,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 204 states, 204 states have (on average 1.0980392156862746) internal successors, (224), 203 states have internal predecessors, (224), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 21:30:25,503 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 239 transitions. [2022-01-30 21:30:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-30 21:30:25,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:30:25,505 INFO L514 BasicCegarLoop]: trace histogram [200, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:30:25,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-30 21:30:25,731 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,SelfDestructingSolverStorable12 [2022-01-30 21:30:25,731 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:30:25,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:30:25,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1844065352, now seen corresponding path program 5 times [2022-01-30 21:30:25,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:30:25,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877187053] [2022-01-30 21:30:25,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:30:25,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:30:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:38,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:30:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:38,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2022-01-30 21:30:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20115 backedges. 2 proven. 20100 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-30 21:30:38,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:30:38,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877187053] [2022-01-30 21:30:38,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877187053] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:30:38,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29822178] [2022-01-30 21:30:38,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 21:30:38,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:30:38,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:30:38,461 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:30:38,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process