/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/loops-crafted-1/theatreSquare.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 13:00:22,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 13:00:22,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 13:00:22,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 13:00:22,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 13:00:22,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 13:00:22,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 13:00:22,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 13:00:22,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 13:00:22,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 13:00:22,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 13:00:22,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 13:00:22,682 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 13:00:22,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 13:00:22,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 13:00:22,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 13:00:22,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 13:00:22,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 13:00:22,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 13:00:22,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 13:00:22,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 13:00:22,697 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 [2022-03-18 13:00:22,721 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 13:00:22,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 13:00:22,721 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 13:00:22,722 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 13:00:22,723 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 13:00:22,723 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 13:00:22,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 13:00:22,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 13:00:22,724 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 13:00:22,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 13:00:22,725 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 13:00:22,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 13:00:22,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 13:00:22,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 13:00:22,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 13:00:22,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 13:00:22,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 13:00:22,725 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 13:00:22,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 13:00:22,725 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 13:00:22,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 13:00:22,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 13:00:22,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 13:00:22,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 13:00:22,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 13:00:22,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 13:00:22,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 13:00:22,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 13:00:22,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 13:00:22,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 13:00:22,726 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 13:00:22,726 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 13:00:22,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 13:00:22,727 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 13:00:22,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 13:00:22,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 13:00:22,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 13:00:22,880 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 13:00:22,880 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 13:00:22,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-03-18 13:00:22,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ada9e3d77/06bbe99f380c4a569d7ef705303f95ad/FLAG9a9b29bf2 [2022-03-18 13:00:23,262 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 13:00:23,263 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-03-18 13:00:23,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ada9e3d77/06bbe99f380c4a569d7ef705303f95ad/FLAG9a9b29bf2 [2022-03-18 13:00:23,277 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ada9e3d77/06bbe99f380c4a569d7ef705303f95ad [2022-03-18 13:00:23,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 13:00:23,279 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 13:00:23,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 13:00:23,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 13:00:23,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 13:00:23,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:00:23" (1/1) ... [2022-03-18 13:00:23,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22204a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:00:23, skipping insertion in model container [2022-03-18 13:00:23,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:00:23" (1/1) ... [2022-03-18 13:00:23,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 13:00:23,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 13:00:23,408 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2022-03-18 13:00:23,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 13:00:23,439 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 13:00:23,449 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2022-03-18 13:00:23,454 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 13:00:23,463 INFO L208 MainTranslator]: Completed translation [2022-03-18 13:00:23,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:00:23 WrapperNode [2022-03-18 13:00:23,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 13:00:23,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 13:00:23,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 13:00:23,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 13:00:23,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:00:23" (1/1) ... [2022-03-18 13:00:23,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:00:23" (1/1) ... [2022-03-18 13:00:23,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:00:23" (1/1) ... [2022-03-18 13:00:23,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:00:23" (1/1) ... [2022-03-18 13:00:23,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:00:23" (1/1) ... [2022-03-18 13:00:23,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:00:23" (1/1) ... [2022-03-18 13:00:23,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:00:23" (1/1) ... [2022-03-18 13:00:23,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 13:00:23,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 13:00:23,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 13:00:23,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 13:00:23,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:00:23" (1/1) ... [2022-03-18 13:00:23,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 13:00:23,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:23,540 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) [2022-03-18 13:00:23,559 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 [2022-03-18 13:00:23,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 13:00:23,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 13:00:23,576 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 13:00:23,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 13:00:23,577 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2022-03-18 13:00:23,577 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2022-03-18 13:00:23,577 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 13:00:23,577 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 13:00:23,577 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 13:00:23,577 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 13:00:23,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 13:00:23,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 13:00:23,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 13:00:23,578 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2022-03-18 13:00:23,578 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2022-03-18 13:00:23,578 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 13:00:23,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 13:00:23,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 13:00:23,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 13:00:23,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 13:00:23,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 13:00:23,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 13:00:23,656 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 13:00:23,658 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 13:00:23,810 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 13:00:23,814 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 13:00:23,814 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-03-18 13:00:23,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:00:23 BoogieIcfgContainer [2022-03-18 13:00:23,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 13:00:23,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 13:00:23,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 13:00:23,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 13:00:23,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 01:00:23" (1/3) ... [2022-03-18 13:00:23,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a21b339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:00:23, skipping insertion in model container [2022-03-18 13:00:23,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:00:23" (2/3) ... [2022-03-18 13:00:23,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a21b339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:00:23, skipping insertion in model container [2022-03-18 13:00:23,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:00:23" (3/3) ... [2022-03-18 13:00:23,821 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2022-03-18 13:00:23,824 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 13:00:23,824 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 13:00:23,868 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 13:00:23,873 INFO L340 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 [2022-03-18 13:00:23,873 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 13:00:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 13:00:23,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 13:00:23,888 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:23,888 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:23,889 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1554304209, now seen corresponding path program 1 times [2022-03-18 13:00:23,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:23,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549799191] [2022-03-18 13:00:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:23,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:24,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 13:00:24,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:24,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549799191] [2022-03-18 13:00:24,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549799191] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:00:24,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:00:24,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 13:00:24,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392645260] [2022-03-18 13:00:24,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:00:24,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 13:00:24,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:24,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 13:00:24,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 13:00:24,127 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-03-18 13:00:24,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:24,334 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-03-18 13:00:24,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 13:00:24,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 11 [2022-03-18 13:00:24,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:24,341 INFO L225 Difference]: With dead ends: 76 [2022-03-18 13:00:24,341 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 13:00:24,343 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 13:00:24,348 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 46 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:24,350 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 61 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:00:24,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 13:00:24,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-18 13:00:24,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 13:00:24,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-03-18 13:00:24,381 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2022-03-18 13:00:24,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:24,381 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-03-18 13:00:24,382 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-03-18 13:00:24,382 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-03-18 13:00:24,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 13:00:24,383 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:24,384 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:24,384 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 13:00:24,384 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:24,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:24,389 INFO L85 PathProgramCache]: Analyzing trace with hash 362112746, now seen corresponding path program 1 times [2022-03-18 13:00:24,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:24,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283379048] [2022-03-18 13:00:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:24,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:24,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:24,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:24,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 13:00:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 13:00:24,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:24,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283379048] [2022-03-18 13:00:24,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283379048] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:00:24,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:00:24,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 13:00:24,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296299484] [2022-03-18 13:00:24,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:00:24,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 13:00:24,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:24,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 13:00:24,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-18 13:00:24,632 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:24,889 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-03-18 13:00:24,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 13:00:24,890 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-03-18 13:00:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:24,892 INFO L225 Difference]: With dead ends: 50 [2022-03-18 13:00:24,892 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 13:00:24,893 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-18 13:00:24,894 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:24,894 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 80 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:00:24,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 13:00:24,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-03-18 13:00:24,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 13:00:24,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-18 13:00:24,902 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 31 [2022-03-18 13:00:24,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:24,902 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-18 13:00:24,903 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:24,903 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-18 13:00:24,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 13:00:24,904 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:24,904 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:24,904 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 13:00:24,904 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:24,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:24,905 INFO L85 PathProgramCache]: Analyzing trace with hash -310269904, now seen corresponding path program 1 times [2022-03-18 13:00:24,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:24,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893839503] [2022-03-18 13:00:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:24,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:24,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:24,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:24,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 13:00:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 13:00:24,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:24,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893839503] [2022-03-18 13:00:24,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893839503] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:00:24,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:00:24,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 13:00:24,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710657095] [2022-03-18 13:00:24,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:00:24,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 13:00:24,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:24,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 13:00:24,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 13:00:24,951 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:00:25,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:25,013 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-03-18 13:00:25,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 13:00:25,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-03-18 13:00:25,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:25,015 INFO L225 Difference]: With dead ends: 59 [2022-03-18 13:00:25,015 INFO L226 Difference]: Without dead ends: 49 [2022-03-18 13:00:25,015 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-18 13:00:25,016 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:25,017 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 45 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 13:00:25,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-18 13:00:25,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-03-18 13:00:25,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 36 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 13:00:25,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-03-18 13:00:25,024 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 32 [2022-03-18 13:00:25,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:25,024 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-03-18 13:00:25,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:00:25,025 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-03-18 13:00:25,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 13:00:25,026 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:25,026 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:25,026 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 13:00:25,026 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:25,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:25,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1053423629, now seen corresponding path program 1 times [2022-03-18 13:00:25,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:25,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094398070] [2022-03-18 13:00:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:25,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 13:00:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 13:00:25,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:25,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094398070] [2022-03-18 13:00:25,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094398070] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:00:25,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:00:25,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 13:00:25,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221940475] [2022-03-18 13:00:25,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:00:25,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 13:00:25,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:25,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 13:00:25,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 13:00:25,070 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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) [2022-03-18 13:00:25,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:25,136 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2022-03-18 13:00:25,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 13:00:25,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 32 [2022-03-18 13:00:25,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:25,137 INFO L225 Difference]: With dead ends: 81 [2022-03-18 13:00:25,137 INFO L226 Difference]: Without dead ends: 53 [2022-03-18 13:00:25,138 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-18 13:00:25,139 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:25,139 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 45 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 13:00:25,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-18 13:00:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2022-03-18 13:00:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 40 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 13:00:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-03-18 13:00:25,145 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 32 [2022-03-18 13:00:25,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:25,145 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-03-18 13:00:25,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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) [2022-03-18 13:00:25,145 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-03-18 13:00:25,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 13:00:25,146 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:25,146 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:25,146 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 13:00:25,146 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:25,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:25,147 INFO L85 PathProgramCache]: Analyzing trace with hash 755216986, now seen corresponding path program 1 times [2022-03-18 13:00:25,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:25,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226485729] [2022-03-18 13:00:25,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:25,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 13:00:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:00:25,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:25,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226485729] [2022-03-18 13:00:25,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226485729] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:00:25,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:00:25,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 13:00:25,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245097768] [2022-03-18 13:00:25,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:00:25,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 13:00:25,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:25,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 13:00:25,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 13:00:25,199 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 13:00:25,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:25,275 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2022-03-18 13:00:25,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 13:00:25,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-03-18 13:00:25,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:25,276 INFO L225 Difference]: With dead ends: 77 [2022-03-18 13:00:25,276 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 13:00:25,276 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-18 13:00:25,277 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:25,277 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 50 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:00:25,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 13:00:25,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-18 13:00:25,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 13:00:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-03-18 13:00:25,282 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 33 [2022-03-18 13:00:25,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:25,282 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-03-18 13:00:25,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 13:00:25,282 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-03-18 13:00:25,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 13:00:25,283 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:25,283 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:25,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-18 13:00:25,283 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:25,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:25,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1803948538, now seen corresponding path program 1 times [2022-03-18 13:00:25,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:25,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519748562] [2022-03-18 13:00:25,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:25,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 13:00:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:00:25,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:25,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519748562] [2022-03-18 13:00:25,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519748562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:00:25,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:00:25,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 13:00:25,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028527063] [2022-03-18 13:00:25,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:00:25,328 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 13:00:25,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:25,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 13:00:25,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 13:00:25,329 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 13:00:25,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:25,401 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2022-03-18 13:00:25,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 13:00:25,402 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-03-18 13:00:25,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:25,402 INFO L225 Difference]: With dead ends: 83 [2022-03-18 13:00:25,402 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 13:00:25,403 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-18 13:00:25,403 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:25,404 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 50 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:00:25,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 13:00:25,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-18 13:00:25,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 13:00:25,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-03-18 13:00:25,408 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 33 [2022-03-18 13:00:25,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:25,408 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-03-18 13:00:25,408 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 13:00:25,408 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-03-18 13:00:25,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 13:00:25,409 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:25,409 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:25,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-18 13:00:25,409 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:25,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:25,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1563500484, now seen corresponding path program 1 times [2022-03-18 13:00:25,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:25,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038164869] [2022-03-18 13:00:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:25,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 13:00:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 13:00:25,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:25,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038164869] [2022-03-18 13:00:25,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038164869] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:00:25,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:00:25,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 13:00:25,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338925729] [2022-03-18 13:00:25,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:00:25,454 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 13:00:25,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:25,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 13:00:25,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 13:00:25,454 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:25,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:25,536 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-03-18 13:00:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 13:00:25,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-03-18 13:00:25,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:25,537 INFO L225 Difference]: With dead ends: 57 [2022-03-18 13:00:25,537 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 13:00:25,538 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-18 13:00:25,538 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:25,539 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 50 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:00:25,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 13:00:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-18 13:00:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 13:00:25,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-03-18 13:00:25,554 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 34 [2022-03-18 13:00:25,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:25,556 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-03-18 13:00:25,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:25,559 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-03-18 13:00:25,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 13:00:25,559 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:25,560 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:25,560 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-18 13:00:25,560 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:25,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:25,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1234948107, now seen corresponding path program 1 times [2022-03-18 13:00:25,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:25,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392887859] [2022-03-18 13:00:25,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:25,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 13:00:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 13:00:25,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:25,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392887859] [2022-03-18 13:00:25,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392887859] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:00:25,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:00:25,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 13:00:25,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807024285] [2022-03-18 13:00:25,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:00:25,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 13:00:25,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:25,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 13:00:25,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-18 13:00:25,633 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 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) [2022-03-18 13:00:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:25,702 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2022-03-18 13:00:25,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 13:00:25,703 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 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 35 [2022-03-18 13:00:25,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:25,705 INFO L225 Difference]: With dead ends: 64 [2022-03-18 13:00:25,706 INFO L226 Difference]: Without dead ends: 40 [2022-03-18 13:00:25,709 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-18 13:00:25,709 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:25,709 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 49 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 13:00:25,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-18 13:00:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2022-03-18 13:00:25,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 13:00:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-03-18 13:00:25,717 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 35 [2022-03-18 13:00:25,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:25,718 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-03-18 13:00:25,720 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 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) [2022-03-18 13:00:25,721 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-03-18 13:00:25,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 13:00:25,722 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:25,723 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:25,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-18 13:00:25,723 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:25,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:25,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2078941294, now seen corresponding path program 1 times [2022-03-18 13:00:25,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:25,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097651163] [2022-03-18 13:00:25,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:25,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 13:00:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 13:00:25,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:25,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097651163] [2022-03-18 13:00:25,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097651163] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:00:25,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:00:25,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 13:00:25,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968363631] [2022-03-18 13:00:25,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:00:25,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 13:00:25,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:25,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 13:00:25,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-03-18 13:00:25,798 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:25,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:25,881 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-03-18 13:00:25,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 13:00:25,881 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-03-18 13:00:25,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:25,882 INFO L225 Difference]: With dead ends: 46 [2022-03-18 13:00:25,882 INFO L226 Difference]: Without dead ends: 37 [2022-03-18 13:00:25,882 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-03-18 13:00:25,882 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:25,883 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 49 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:00:25,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-18 13:00:25,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-18 13:00:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 13:00:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-03-18 13:00:25,885 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 35 [2022-03-18 13:00:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:25,886 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-03-18 13:00:25,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-03-18 13:00:25,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 13:00:25,886 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:25,886 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:25,886 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-18 13:00:25,886 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:25,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:25,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1371807532, now seen corresponding path program 1 times [2022-03-18 13:00:25,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:25,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206123317] [2022-03-18 13:00:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:25,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 13:00:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 13:00:25,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:25,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206123317] [2022-03-18 13:00:25,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206123317] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:00:25,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:00:25,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 13:00:25,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695295549] [2022-03-18 13:00:25,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:00:25,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 13:00:25,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:25,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 13:00:25,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 13:00:25,931 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:26,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:26,004 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-03-18 13:00:26,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 13:00:26,005 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-03-18 13:00:26,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:26,005 INFO L225 Difference]: With dead ends: 50 [2022-03-18 13:00:26,005 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 13:00:26,005 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-18 13:00:26,006 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:26,006 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 50 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:00:26,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 13:00:26,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-18 13:00:26,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 13:00:26,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-03-18 13:00:26,009 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 36 [2022-03-18 13:00:26,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:26,009 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-03-18 13:00:26,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:26,009 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-03-18 13:00:26,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 13:00:26,010 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:26,010 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:26,010 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-18 13:00:26,010 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:26,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:26,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1443111891, now seen corresponding path program 1 times [2022-03-18 13:00:26,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:26,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607969817] [2022-03-18 13:00:26,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:26,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:26,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:26,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:26,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 13:00:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:00:26,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:26,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607969817] [2022-03-18 13:00:26,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607969817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:26,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523338444] [2022-03-18 13:00:26,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:26,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:26,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:26,232 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) [2022-03-18 13:00:26,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 13:00:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:26,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 13:00:26,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:00:26,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:00:26,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523338444] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:26,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:26,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 25 [2022-03-18 13:00:26,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54842361] [2022-03-18 13:00:26,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:26,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 13:00:26,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:26,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 13:00:26,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2022-03-18 13:00:26,736 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 25 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:27,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:27,198 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2022-03-18 13:00:27,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 13:00:27,199 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2022-03-18 13:00:27,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:27,199 INFO L225 Difference]: With dead ends: 70 [2022-03-18 13:00:27,199 INFO L226 Difference]: Without dead ends: 64 [2022-03-18 13:00:27,200 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 13:00:27,201 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 69 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:27,201 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 113 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 13:00:27,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-18 13:00:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-03-18 13:00:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 13:00:27,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2022-03-18 13:00:27,206 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 37 [2022-03-18 13:00:27,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:27,206 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2022-03-18 13:00:27,206 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:27,206 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2022-03-18 13:00:27,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 13:00:27,207 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:27,207 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:27,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:27,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 13:00:27,420 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:27,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:27,420 INFO L85 PathProgramCache]: Analyzing trace with hash -437658803, now seen corresponding path program 2 times [2022-03-18 13:00:27,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:27,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975245391] [2022-03-18 13:00:27,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:27,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:27,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:27,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:27,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 13:00:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:27,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:27,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975245391] [2022-03-18 13:00:27,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975245391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:27,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534003104] [2022-03-18 13:00:27,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:00:27,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:27,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:27,508 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) [2022-03-18 13:00:27,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 13:00:27,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:00:27,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:27,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 13:00:27,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:27,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:27,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534003104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:27,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:27,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-03-18 13:00:27,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832655675] [2022-03-18 13:00:27,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:27,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 13:00:27,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:27,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 13:00:27,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-18 13:00:27,711 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:00:27,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:27,786 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2022-03-18 13:00:27,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 13:00:27,786 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2022-03-18 13:00:27,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:27,788 INFO L225 Difference]: With dead ends: 80 [2022-03-18 13:00:27,788 INFO L226 Difference]: Without dead ends: 70 [2022-03-18 13:00:27,788 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-03-18 13:00:27,788 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:27,789 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 49 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 13:00:27,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-18 13:00:27,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-03-18 13:00:27,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 13:00:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-03-18 13:00:27,802 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 38 [2022-03-18 13:00:27,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:27,802 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-03-18 13:00:27,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:00:27,802 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-03-18 13:00:27,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 13:00:27,803 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:27,803 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:27,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:28,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 13:00:28,020 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:28,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:28,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1488699212, now seen corresponding path program 3 times [2022-03-18 13:00:28,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:28,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065300587] [2022-03-18 13:00:28,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:28,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:28,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:28,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:28,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 13:00:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:28,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:28,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065300587] [2022-03-18 13:00:28,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065300587] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:28,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10326136] [2022-03-18 13:00:28,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:00:28,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:28,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:28,128 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) [2022-03-18 13:00:28,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 13:00:28,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-18 13:00:28,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:28,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 13:00:28,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:28,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:28,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10326136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:28,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:28,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-03-18 13:00:28,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006248039] [2022-03-18 13:00:28,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:28,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 13:00:28,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:28,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 13:00:28,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-03-18 13:00:28,571 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:28,805 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2022-03-18 13:00:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 13:00:28,805 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-03-18 13:00:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:28,806 INFO L225 Difference]: With dead ends: 82 [2022-03-18 13:00:28,806 INFO L226 Difference]: Without dead ends: 76 [2022-03-18 13:00:28,806 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-03-18 13:00:28,807 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 90 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:28,807 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 76 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:00:28,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-18 13:00:28,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-03-18 13:00:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 63 states have internal predecessors, (74), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-18 13:00:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-03-18 13:00:28,812 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 38 [2022-03-18 13:00:28,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:28,812 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-03-18 13:00:28,812 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:28,812 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-03-18 13:00:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 13:00:28,813 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:28,813 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:28,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:29,014 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:29,014 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:29,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:29,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1229776654, now seen corresponding path program 4 times [2022-03-18 13:00:29,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:29,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133779720] [2022-03-18 13:00:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:29,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:29,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:29,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:29,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 13:00:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:29,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:29,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133779720] [2022-03-18 13:00:29,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133779720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:29,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815759472] [2022-03-18 13:00:29,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:00:29,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:29,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:29,056 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) [2022-03-18 13:00:29,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 13:00:29,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:00:29,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:29,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 13:00:29,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:29,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:29,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815759472] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:29,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:29,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-03-18 13:00:29,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957986230] [2022-03-18 13:00:29,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:29,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 13:00:29,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:29,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 13:00:29,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-18 13:00:29,238 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:29,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:29,333 INFO L93 Difference]: Finished difference Result 140 states and 174 transitions. [2022-03-18 13:00:29,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 13:00:29,333 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-03-18 13:00:29,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:29,334 INFO L225 Difference]: With dead ends: 140 [2022-03-18 13:00:29,334 INFO L226 Difference]: Without dead ends: 90 [2022-03-18 13:00:29,334 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-03-18 13:00:29,334 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:29,335 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 49 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:00:29,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-18 13:00:29,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-03-18 13:00:29,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 73 states have internal predecessors, (87), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-18 13:00:29,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2022-03-18 13:00:29,340 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 38 [2022-03-18 13:00:29,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:29,341 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2022-03-18 13:00:29,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:29,341 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2022-03-18 13:00:29,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 13:00:29,341 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:29,341 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:29,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 13:00:29,542 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:29,542 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:29,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:29,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1473231215, now seen corresponding path program 5 times [2022-03-18 13:00:29,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:29,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432988586] [2022-03-18 13:00:29,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:29,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:29,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:29,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:29,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 13:00:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:29,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:29,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432988586] [2022-03-18 13:00:29,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432988586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:29,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8599404] [2022-03-18 13:00:29,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:00:29,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:29,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:29,668 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) [2022-03-18 13:00:29,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 13:00:29,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:00:29,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:29,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 13:00:29,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:29,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:30,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8599404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:30,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:30,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-03-18 13:00:30,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564142018] [2022-03-18 13:00:30,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:30,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 13:00:30,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:30,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 13:00:30,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-03-18 13:00:30,072 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:30,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:30,377 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2022-03-18 13:00:30,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 13:00:30,378 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-03-18 13:00:30,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:30,379 INFO L225 Difference]: With dead ends: 92 [2022-03-18 13:00:30,379 INFO L226 Difference]: Without dead ends: 86 [2022-03-18 13:00:30,387 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-03-18 13:00:30,388 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 81 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:30,390 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 95 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 13:00:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-18 13:00:30,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-03-18 13:00:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 73 states have internal predecessors, (87), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-18 13:00:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2022-03-18 13:00:30,398 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 38 [2022-03-18 13:00:30,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:30,398 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2022-03-18 13:00:30,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:30,398 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2022-03-18 13:00:30,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 13:00:30,398 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:30,398 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:30,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:30,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-18 13:00:30,615 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:30,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:30,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1109766783, now seen corresponding path program 6 times [2022-03-18 13:00:30,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:30,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014172807] [2022-03-18 13:00:30,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:30,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:30,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:30,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:30,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 13:00:30,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:30,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:30,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014172807] [2022-03-18 13:00:30,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014172807] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:30,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919561975] [2022-03-18 13:00:30,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:00:30,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:30,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:30,751 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) [2022-03-18 13:00:30,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 13:00:30,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-18 13:00:30,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:30,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 13:00:30,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:00:30,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:00:31,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919561975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:31,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:31,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 21 [2022-03-18 13:00:31,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697015970] [2022-03-18 13:00:31,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:31,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 13:00:31,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:31,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 13:00:31,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-18 13:00:31,133 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:31,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:31,408 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2022-03-18 13:00:31,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 13:00:31,408 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-03-18 13:00:31,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:31,409 INFO L225 Difference]: With dead ends: 108 [2022-03-18 13:00:31,409 INFO L226 Difference]: Without dead ends: 94 [2022-03-18 13:00:31,409 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-03-18 13:00:31,410 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 109 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:31,410 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 89 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 13:00:31,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-18 13:00:31,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2022-03-18 13:00:31,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 77 states have internal predecessors, (88), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-18 13:00:31,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2022-03-18 13:00:31,416 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 39 [2022-03-18 13:00:31,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:31,416 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2022-03-18 13:00:31,416 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:31,416 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2022-03-18 13:00:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 13:00:31,417 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:31,417 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:31,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:31,621 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-18 13:00:31,622 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:31,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:31,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1701022282, now seen corresponding path program 7 times [2022-03-18 13:00:31,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:31,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261023862] [2022-03-18 13:00:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:31,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:31,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:31,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:31,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 13:00:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:00:31,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:31,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261023862] [2022-03-18 13:00:31,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261023862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:31,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712576789] [2022-03-18 13:00:31,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:00:31,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:31,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:31,873 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) [2022-03-18 13:00:31,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 13:00:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:31,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 13:00:31,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:00:32,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:00:32,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712576789] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:32,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:32,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 27 [2022-03-18 13:00:32,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403217883] [2022-03-18 13:00:32,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:32,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 13:00:32,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:32,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 13:00:32,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2022-03-18 13:00:32,313 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 27 states, 24 states have (on average 1.625) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:32,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:32,932 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2022-03-18 13:00:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 13:00:32,933 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.625) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-03-18 13:00:32,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:32,934 INFO L225 Difference]: With dead ends: 137 [2022-03-18 13:00:32,934 INFO L226 Difference]: Without dead ends: 131 [2022-03-18 13:00:32,935 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=1901, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 13:00:32,936 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 86 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:32,936 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 128 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 13:00:32,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-18 13:00:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2022-03-18 13:00:32,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 107 states have internal predecessors, (120), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-18 13:00:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2022-03-18 13:00:32,954 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 39 [2022-03-18 13:00:32,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:32,954 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2022-03-18 13:00:32,954 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.625) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:32,955 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2022-03-18 13:00:32,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 13:00:32,956 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:32,956 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:32,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:33,169 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:33,169 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:33,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1844910907, now seen corresponding path program 8 times [2022-03-18 13:00:33,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:33,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136708374] [2022-03-18 13:00:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:33,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:33,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:33,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:33,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:33,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 13:00:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:33,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:33,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136708374] [2022-03-18 13:00:33,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136708374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:33,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562665440] [2022-03-18 13:00:33,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:00:33,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:33,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:33,289 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) [2022-03-18 13:00:33,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 13:00:33,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:00:33,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:33,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 13:00:33,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:00:33,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:00:33,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562665440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:33,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:33,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 21 [2022-03-18 13:00:33,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466647720] [2022-03-18 13:00:33,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:33,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 13:00:33,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:33,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 13:00:33,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-18 13:00:33,636 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:33,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:33,939 INFO L93 Difference]: Finished difference Result 132 states and 159 transitions. [2022-03-18 13:00:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 13:00:33,939 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-03-18 13:00:33,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:33,940 INFO L225 Difference]: With dead ends: 132 [2022-03-18 13:00:33,940 INFO L226 Difference]: Without dead ends: 120 [2022-03-18 13:00:33,940 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-03-18 13:00:33,941 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 87 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:33,941 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 99 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 13:00:33,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-18 13:00:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2022-03-18 13:00:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 104 states have internal predecessors, (116), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-03-18 13:00:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 142 transitions. [2022-03-18 13:00:33,952 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 142 transitions. Word has length 39 [2022-03-18 13:00:33,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:33,952 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 142 transitions. [2022-03-18 13:00:33,952 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:33,952 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 142 transitions. [2022-03-18 13:00:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 13:00:33,953 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:33,953 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:33,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:34,169 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 13:00:34,170 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:34,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:34,170 INFO L85 PathProgramCache]: Analyzing trace with hash 172610767, now seen corresponding path program 9 times [2022-03-18 13:00:34,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:34,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816862536] [2022-03-18 13:00:34,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:34,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:34,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:34,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:34,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 13:00:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:34,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:34,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816862536] [2022-03-18 13:00:34,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816862536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:34,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493924140] [2022-03-18 13:00:34,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:00:34,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:34,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:34,329 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) [2022-03-18 13:00:34,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 13:00:34,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 13:00:34,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:34,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 13:00:34,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:34,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:34,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493924140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:34,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:34,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-03-18 13:00:34,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909761899] [2022-03-18 13:00:34,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:34,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 13:00:34,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:34,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 13:00:34,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-18 13:00:34,863 INFO L87 Difference]: Start difference. First operand 118 states and 142 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:35,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:35,303 INFO L93 Difference]: Finished difference Result 136 states and 165 transitions. [2022-03-18 13:00:35,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 13:00:35,304 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-03-18 13:00:35,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:35,304 INFO L225 Difference]: With dead ends: 136 [2022-03-18 13:00:35,304 INFO L226 Difference]: Without dead ends: 122 [2022-03-18 13:00:35,305 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 13:00:35,305 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 152 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:35,306 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 101 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 13:00:35,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-18 13:00:35,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2022-03-18 13:00:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 89 states have (on average 1.247191011235955) internal successors, (111), 99 states have internal predecessors, (111), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-03-18 13:00:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 138 transitions. [2022-03-18 13:00:35,315 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 138 transitions. Word has length 40 [2022-03-18 13:00:35,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:35,315 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 138 transitions. [2022-03-18 13:00:35,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 138 transitions. [2022-03-18 13:00:35,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 13:00:35,316 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:35,316 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:35,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:35,533 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:35,533 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:35,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:35,534 INFO L85 PathProgramCache]: Analyzing trace with hash -306897140, now seen corresponding path program 10 times [2022-03-18 13:00:35,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:35,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90288471] [2022-03-18 13:00:35,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:35,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:35,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:35,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:35,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 13:00:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:35,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:35,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90288471] [2022-03-18 13:00:35,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90288471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:35,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992183369] [2022-03-18 13:00:35,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:00:35,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:35,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:35,696 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) [2022-03-18 13:00:35,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 13:00:35,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:00:35,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:35,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 13:00:35,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:35,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:36,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992183369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:36,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:36,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-03-18 13:00:36,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063584660] [2022-03-18 13:00:36,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:36,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 13:00:36,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:36,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 13:00:36,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-18 13:00:36,199 INFO L87 Difference]: Start difference. First operand 113 states and 138 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:36,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:36,760 INFO L93 Difference]: Finished difference Result 128 states and 153 transitions. [2022-03-18 13:00:36,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 13:00:36,761 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-03-18 13:00:36,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:36,761 INFO L225 Difference]: With dead ends: 128 [2022-03-18 13:00:36,762 INFO L226 Difference]: Without dead ends: 116 [2022-03-18 13:00:36,762 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 13:00:36,762 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 144 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:36,763 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 135 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 13:00:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-18 13:00:36,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2022-03-18 13:00:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 90 states have (on average 1.2444444444444445) internal successors, (112), 100 states have internal predecessors, (112), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-18 13:00:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2022-03-18 13:00:36,771 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 40 [2022-03-18 13:00:36,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:36,771 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2022-03-18 13:00:36,771 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:36,771 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2022-03-18 13:00:36,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 13:00:36,771 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:36,772 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:36,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:36,972 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:36,972 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:36,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:36,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1295907854, now seen corresponding path program 11 times [2022-03-18 13:00:36,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:36,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529050588] [2022-03-18 13:00:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:36,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:36,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:36,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:37,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 13:00:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 13:00:37,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:37,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529050588] [2022-03-18 13:00:37,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529050588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:37,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124201677] [2022-03-18 13:00:37,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:00:37,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:37,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:37,040 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) [2022-03-18 13:00:37,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 13:00:37,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:00:37,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:37,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 13:00:37,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 13:00:37,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 13:00:37,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124201677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:37,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:37,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-03-18 13:00:37,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879713549] [2022-03-18 13:00:37,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:37,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 13:00:37,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:37,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 13:00:37,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-03-18 13:00:37,224 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:37,336 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2022-03-18 13:00:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 13:00:37,336 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-03-18 13:00:37,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:37,337 INFO L225 Difference]: With dead ends: 170 [2022-03-18 13:00:37,337 INFO L226 Difference]: Without dead ends: 105 [2022-03-18 13:00:37,337 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-03-18 13:00:37,338 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 53 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:37,338 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 53 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:00:37,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-18 13:00:37,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2022-03-18 13:00:37,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 85 states have internal predecessors, (97), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-03-18 13:00:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2022-03-18 13:00:37,346 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 40 [2022-03-18 13:00:37,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:37,346 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2022-03-18 13:00:37,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:37,347 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2022-03-18 13:00:37,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 13:00:37,347 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:37,347 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:37,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:37,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-18 13:00:37,564 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:37,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:37,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1335621997, now seen corresponding path program 12 times [2022-03-18 13:00:37,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:37,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708603339] [2022-03-18 13:00:37,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:37,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:37,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:37,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:37,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 13:00:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 13:00:37,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:37,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708603339] [2022-03-18 13:00:37,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708603339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:37,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910205274] [2022-03-18 13:00:37,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:00:37,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:37,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:37,616 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:00:37,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 13:00:37,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-18 13:00:37,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:37,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 13:00:37,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 13:00:37,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 13:00:37,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910205274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:37,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:37,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-03-18 13:00:37,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202706481] [2022-03-18 13:00:37,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:37,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 13:00:37,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:37,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 13:00:37,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-03-18 13:00:37,796 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:00:37,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:37,893 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2022-03-18 13:00:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 13:00:37,893 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-03-18 13:00:37,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:37,893 INFO L225 Difference]: With dead ends: 115 [2022-03-18 13:00:37,893 INFO L226 Difference]: Without dead ends: 100 [2022-03-18 13:00:37,894 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-03-18 13:00:37,900 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:37,901 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 46 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:00:37,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-18 13:00:37,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-03-18 13:00:37,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 88 states have internal predecessors, (100), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-03-18 13:00:37,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2022-03-18 13:00:37,908 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 40 [2022-03-18 13:00:37,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:37,908 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2022-03-18 13:00:37,908 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:00:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2022-03-18 13:00:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 13:00:37,909 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:37,909 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:37,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:38,126 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-18 13:00:38,126 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:38,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:38,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1943349171, now seen corresponding path program 13 times [2022-03-18 13:00:38,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:38,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061522290] [2022-03-18 13:00:38,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:38,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:38,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:38,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:38,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 13:00:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:00:38,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:38,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061522290] [2022-03-18 13:00:38,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061522290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:38,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800821132] [2022-03-18 13:00:38,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:00:38,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:38,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:38,405 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:00:38,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 13:00:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:38,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 13:00:38,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:00:38,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:00:39,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800821132] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:39,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:39,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 29 [2022-03-18 13:00:39,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785076877] [2022-03-18 13:00:39,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:39,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 13:00:39,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:39,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 13:00:39,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2022-03-18 13:00:39,008 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:39,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:39,638 INFO L93 Difference]: Finished difference Result 140 states and 164 transitions. [2022-03-18 13:00:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 13:00:39,639 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-03-18 13:00:39,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:39,640 INFO L225 Difference]: With dead ends: 140 [2022-03-18 13:00:39,640 INFO L226 Difference]: Without dead ends: 134 [2022-03-18 13:00:39,641 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=2269, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 13:00:39,641 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 105 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:39,641 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 166 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 13:00:39,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-18 13:00:39,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 116. [2022-03-18 13:00:39,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 103 states have internal predecessors, (115), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-18 13:00:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2022-03-18 13:00:39,652 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 41 [2022-03-18 13:00:39,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:39,652 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2022-03-18 13:00:39,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:39,652 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2022-03-18 13:00:39,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 13:00:39,667 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:39,667 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:39,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:39,868 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-18 13:00:39,868 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:39,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:39,868 INFO L85 PathProgramCache]: Analyzing trace with hash -196254195, now seen corresponding path program 14 times [2022-03-18 13:00:39,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:39,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966896672] [2022-03-18 13:00:39,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:39,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:39,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:39,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:39,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 13:00:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:00:40,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:40,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966896672] [2022-03-18 13:00:40,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966896672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:40,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488270635] [2022-03-18 13:00:40,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:00:40,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:40,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:40,130 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:00:40,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 13:00:40,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:00:40,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:40,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 13:00:40,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:00:40,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:00:40,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488270635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:40,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:40,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 29 [2022-03-18 13:00:40,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687742206] [2022-03-18 13:00:40,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:40,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 13:00:40,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:40,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 13:00:40,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2022-03-18 13:00:40,698 INFO L87 Difference]: Start difference. First operand 116 states and 136 transitions. Second operand has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:41,164 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2022-03-18 13:00:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 13:00:41,164 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-03-18 13:00:41,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:41,166 INFO L225 Difference]: With dead ends: 134 [2022-03-18 13:00:41,166 INFO L226 Difference]: Without dead ends: 128 [2022-03-18 13:00:41,167 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 70 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=2073, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 13:00:41,167 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:41,167 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 138 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 13:00:41,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-18 13:00:41,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-03-18 13:00:41,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 102 states have (on average 1.2156862745098038) internal successors, (124), 112 states have internal predecessors, (124), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-18 13:00:41,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2022-03-18 13:00:41,184 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 41 [2022-03-18 13:00:41,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:41,185 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2022-03-18 13:00:41,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:41,185 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2022-03-18 13:00:41,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 13:00:41,185 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:41,186 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:41,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:41,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:41,403 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:41,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:41,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1133754580, now seen corresponding path program 15 times [2022-03-18 13:00:41,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:41,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075834189] [2022-03-18 13:00:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:41,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:41,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:41,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:41,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 13:00:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:41,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:41,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075834189] [2022-03-18 13:00:41,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075834189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:41,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791918529] [2022-03-18 13:00:41,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:00:41,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:41,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:41,619 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:00:41,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 13:00:41,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 13:00:41,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:41,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 13:00:41,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:41,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:42,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791918529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:42,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:42,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-18 13:00:42,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566476507] [2022-03-18 13:00:42,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:42,272 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 13:00:42,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:42,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 13:00:42,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-18 13:00:42,273 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:42,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:42,998 INFO L93 Difference]: Finished difference Result 152 states and 180 transitions. [2022-03-18 13:00:42,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 13:00:42,998 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-03-18 13:00:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:42,999 INFO L225 Difference]: With dead ends: 152 [2022-03-18 13:00:42,999 INFO L226 Difference]: Without dead ends: 138 [2022-03-18 13:00:43,000 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 13:00:43,000 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 264 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:43,001 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 121 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 13:00:43,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-18 13:00:43,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2022-03-18 13:00:43,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 105 states have (on average 1.2285714285714286) internal successors, (129), 115 states have internal predecessors, (129), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-18 13:00:43,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2022-03-18 13:00:43,013 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 42 [2022-03-18 13:00:43,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:43,013 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2022-03-18 13:00:43,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:43,014 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2022-03-18 13:00:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 13:00:43,018 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:43,018 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:43,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:43,221 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:43,221 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:43,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:43,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1181369487, now seen corresponding path program 16 times [2022-03-18 13:00:43,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:43,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005257809] [2022-03-18 13:00:43,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:43,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:43,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:43,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:43,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-18 13:00:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:43,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:43,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005257809] [2022-03-18 13:00:43,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005257809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:43,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776539065] [2022-03-18 13:00:43,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:00:43,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:43,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:43,456 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:00:43,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 13:00:43,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:00:43,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:43,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 13:00:43,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:43,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:44,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776539065] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:44,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:44,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-18 13:00:44,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175676723] [2022-03-18 13:00:44,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:44,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 13:00:44,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:44,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 13:00:44,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-18 13:00:44,118 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:44,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:44,812 INFO L93 Difference]: Finished difference Result 144 states and 169 transitions. [2022-03-18 13:00:44,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 13:00:44,813 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-03-18 13:00:44,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:44,814 INFO L225 Difference]: With dead ends: 144 [2022-03-18 13:00:44,814 INFO L226 Difference]: Without dead ends: 132 [2022-03-18 13:00:44,815 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 13:00:44,815 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 272 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:44,815 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 130 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 13:00:44,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-18 13:00:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-03-18 13:00:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 116 states have internal predecessors, (130), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-03-18 13:00:44,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2022-03-18 13:00:44,829 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 42 [2022-03-18 13:00:44,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:44,829 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2022-03-18 13:00:44,829 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:44,829 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2022-03-18 13:00:44,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 13:00:44,830 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:44,830 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:44,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-18 13:00:45,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-18 13:00:45,039 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:45,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:45,039 INFO L85 PathProgramCache]: Analyzing trace with hash -439775891, now seen corresponding path program 17 times [2022-03-18 13:00:45,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:45,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019373466] [2022-03-18 13:00:45,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:45,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:45,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:45,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:45,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 13:00:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 13:00:45,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:45,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019373466] [2022-03-18 13:00:45,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019373466] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:45,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820439466] [2022-03-18 13:00:45,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:00:45,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:45,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:45,107 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:00:45,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 13:00:45,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-18 13:00:45,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:45,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 13:00:45,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 13:00:45,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 13:00:45,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820439466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:45,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:45,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-03-18 13:00:45,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177522889] [2022-03-18 13:00:45,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:45,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 13:00:45,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:45,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 13:00:45,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-18 13:00:45,315 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:00:45,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:45,469 INFO L93 Difference]: Finished difference Result 186 states and 223 transitions. [2022-03-18 13:00:45,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 13:00:45,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-03-18 13:00:45,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:45,470 INFO L225 Difference]: With dead ends: 186 [2022-03-18 13:00:45,470 INFO L226 Difference]: Without dead ends: 164 [2022-03-18 13:00:45,470 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2022-03-18 13:00:45,471 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:45,471 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 53 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:00:45,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-18 13:00:45,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 152. [2022-03-18 13:00:45,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 128 states have (on average 1.2265625) internal successors, (157), 138 states have internal predecessors, (157), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-03-18 13:00:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 181 transitions. [2022-03-18 13:00:45,487 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 181 transitions. Word has length 42 [2022-03-18 13:00:45,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:45,488 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 181 transitions. [2022-03-18 13:00:45,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:00:45,488 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 181 transitions. [2022-03-18 13:00:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 13:00:45,488 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:45,489 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:45,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:45,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-18 13:00:45,704 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:45,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:45,704 INFO L85 PathProgramCache]: Analyzing trace with hash -466729134, now seen corresponding path program 18 times [2022-03-18 13:00:45,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:45,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798307198] [2022-03-18 13:00:45,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:45,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:45,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:45,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:45,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-18 13:00:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 13:00:45,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:45,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798307198] [2022-03-18 13:00:45,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798307198] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:45,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079831981] [2022-03-18 13:00:45,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:00:45,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:45,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:45,750 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:00:45,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 13:00:45,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-18 13:00:45,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:45,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 13:00:45,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 13:00:45,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:45,898 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 13:00:45,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079831981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:45,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:45,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-03-18 13:00:45,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008042425] [2022-03-18 13:00:45,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:45,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 13:00:45,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:45,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 13:00:45,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-18 13:00:45,900 INFO L87 Difference]: Start difference. First operand 152 states and 181 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:46,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:46,034 INFO L93 Difference]: Finished difference Result 290 states and 347 transitions. [2022-03-18 13:00:46,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 13:00:46,035 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2022-03-18 13:00:46,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:46,036 INFO L225 Difference]: With dead ends: 290 [2022-03-18 13:00:46,036 INFO L226 Difference]: Without dead ends: 186 [2022-03-18 13:00:46,036 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2022-03-18 13:00:46,037 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 78 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:46,037 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 53 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:00:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-03-18 13:00:46,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 174. [2022-03-18 13:00:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 150 states have (on average 1.2266666666666666) internal successors, (184), 160 states have internal predecessors, (184), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-03-18 13:00:46,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 208 transitions. [2022-03-18 13:00:46,054 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 208 transitions. Word has length 42 [2022-03-18 13:00:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:46,054 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 208 transitions. [2022-03-18 13:00:46,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:46,054 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 208 transitions. [2022-03-18 13:00:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 13:00:46,055 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:46,055 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:46,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:46,272 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-18 13:00:46,272 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:46,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:46,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1243243306, now seen corresponding path program 19 times [2022-03-18 13:00:46,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:46,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020038526] [2022-03-18 13:00:46,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:46,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:46,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:46,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:46,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-18 13:00:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:00:46,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:46,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020038526] [2022-03-18 13:00:46,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020038526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:46,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643256763] [2022-03-18 13:00:46,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:00:46,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:46,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:46,602 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:00:46,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 13:00:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:46,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 13:00:46,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:00:46,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:00:47,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643256763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:47,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:47,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 31 [2022-03-18 13:00:47,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230111711] [2022-03-18 13:00:47,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:47,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 13:00:47,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:47,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 13:00:47,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2022-03-18 13:00:47,095 INFO L87 Difference]: Start difference. First operand 174 states and 208 transitions. Second operand has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:48,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:48,110 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2022-03-18 13:00:48,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 13:00:48,110 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2022-03-18 13:00:48,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:48,111 INFO L225 Difference]: With dead ends: 224 [2022-03-18 13:00:48,111 INFO L226 Difference]: Without dead ends: 218 [2022-03-18 13:00:48,112 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=2669, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 13:00:48,113 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 130 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:48,113 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 180 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 13:00:48,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-18 13:00:48,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 190. [2022-03-18 13:00:48,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 163 states have (on average 1.2208588957055215) internal successors, (199), 175 states have internal predecessors, (199), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2022-03-18 13:00:48,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 227 transitions. [2022-03-18 13:00:48,160 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 227 transitions. Word has length 43 [2022-03-18 13:00:48,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:48,160 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 227 transitions. [2022-03-18 13:00:48,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:48,160 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 227 transitions. [2022-03-18 13:00:48,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 13:00:48,174 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:48,174 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:48,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:48,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-18 13:00:48,375 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:48,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:48,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1453763067, now seen corresponding path program 20 times [2022-03-18 13:00:48,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:48,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000846171] [2022-03-18 13:00:48,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:48,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:48,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:48,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:48,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 13:00:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:48,555 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 13:00:48,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:48,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000846171] [2022-03-18 13:00:48,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000846171] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:48,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071095753] [2022-03-18 13:00:48,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:00:48,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:48,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:48,564 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:00:48,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 13:00:48,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:00:48,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:48,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 13:00:48,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-18 13:00:48,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-18 13:00:49,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071095753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:49,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:49,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 27 [2022-03-18 13:00:49,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692427539] [2022-03-18 13:00:49,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:49,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 13:00:49,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:49,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 13:00:49,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-03-18 13:00:49,123 INFO L87 Difference]: Start difference. First operand 190 states and 227 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:49,646 INFO L93 Difference]: Finished difference Result 230 states and 273 transitions. [2022-03-18 13:00:49,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 13:00:49,647 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-03-18 13:00:49,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:49,648 INFO L225 Difference]: With dead ends: 230 [2022-03-18 13:00:49,648 INFO L226 Difference]: Without dead ends: 215 [2022-03-18 13:00:49,649 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 13:00:49,650 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 176 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:49,650 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 114 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 13:00:49,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-18 13:00:49,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2022-03-18 13:00:49,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 174 states have (on average 1.2011494252873562) internal successors, (209), 192 states have internal predecessors, (209), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2022-03-18 13:00:49,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 249 transitions. [2022-03-18 13:00:49,676 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 249 transitions. Word has length 43 [2022-03-18 13:00:49,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:49,677 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 249 transitions. [2022-03-18 13:00:49,677 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:49,677 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 249 transitions. [2022-03-18 13:00:49,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 13:00:49,678 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:49,678 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:49,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:49,893 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:49,893 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:49,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:49,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1804610186, now seen corresponding path program 21 times [2022-03-18 13:00:49,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:49,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688908190] [2022-03-18 13:00:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:49,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:49,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:49,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:50,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-18 13:00:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:00:50,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:50,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688908190] [2022-03-18 13:00:50,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688908190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:50,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819772297] [2022-03-18 13:00:50,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:00:50,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:50,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:50,168 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:00:50,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 13:00:50,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-18 13:00:50,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:50,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 13:00:50,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:00:50,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:00:50,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819772297] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:50,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:50,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 31 [2022-03-18 13:00:50,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383618751] [2022-03-18 13:00:50,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:50,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 13:00:50,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:50,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 13:00:50,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2022-03-18 13:00:50,715 INFO L87 Difference]: Start difference. First operand 210 states and 249 transitions. Second operand has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:51,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:51,462 INFO L93 Difference]: Finished difference Result 228 states and 271 transitions. [2022-03-18 13:00:51,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 13:00:51,462 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2022-03-18 13:00:51,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:51,463 INFO L225 Difference]: With dead ends: 228 [2022-03-18 13:00:51,464 INFO L226 Difference]: Without dead ends: 213 [2022-03-18 13:00:51,465 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=2457, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 13:00:51,465 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:51,465 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 153 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 13:00:51,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-18 13:00:51,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2022-03-18 13:00:51,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 172 states have (on average 1.2093023255813953) internal successors, (208), 190 states have internal predecessors, (208), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2022-03-18 13:00:51,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 248 transitions. [2022-03-18 13:00:51,486 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 248 transitions. Word has length 43 [2022-03-18 13:00:51,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:51,486 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 248 transitions. [2022-03-18 13:00:51,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:51,486 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 248 transitions. [2022-03-18 13:00:51,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 13:00:51,487 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:51,487 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:51,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:51,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:51,707 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:51,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:51,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2095538945, now seen corresponding path program 22 times [2022-03-18 13:00:51,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:51,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820287424] [2022-03-18 13:00:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:51,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:51,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:51,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:51,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 13:00:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 13:00:51,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:51,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820287424] [2022-03-18 13:00:51,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820287424] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:51,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219900675] [2022-03-18 13:00:51,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:00:51,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:51,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:51,889 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:00:51,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 13:00:51,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:00:51,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:51,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 13:00:51,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-18 13:00:52,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-18 13:00:52,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219900675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:52,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:52,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 27 [2022-03-18 13:00:52,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077683221] [2022-03-18 13:00:52,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:52,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 13:00:52,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:52,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 13:00:52,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-03-18 13:00:52,423 INFO L87 Difference]: Start difference. First operand 208 states and 248 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:52,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:52,914 INFO L93 Difference]: Finished difference Result 222 states and 261 transitions. [2022-03-18 13:00:52,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 13:00:52,914 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-03-18 13:00:52,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:52,915 INFO L225 Difference]: With dead ends: 222 [2022-03-18 13:00:52,915 INFO L226 Difference]: Without dead ends: 202 [2022-03-18 13:00:52,916 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 13:00:52,917 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 221 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:52,917 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 100 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 13:00:52,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-18 13:00:52,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-03-18 13:00:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 164 states have (on average 1.2073170731707317) internal successors, (198), 182 states have internal predecessors, (198), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2022-03-18 13:00:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 236 transitions. [2022-03-18 13:00:52,938 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 236 transitions. Word has length 43 [2022-03-18 13:00:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:52,938 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 236 transitions. [2022-03-18 13:00:52,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 236 transitions. [2022-03-18 13:00:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 13:00:52,939 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:52,939 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:52,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:53,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:53,155 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:53,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:53,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1133635601, now seen corresponding path program 23 times [2022-03-18 13:00:53,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:53,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394321363] [2022-03-18 13:00:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:53,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:53,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:53,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:53,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-18 13:00:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:53,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:53,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394321363] [2022-03-18 13:00:53,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394321363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:53,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639330021] [2022-03-18 13:00:53,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:00:53,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:53,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:53,360 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:00:53,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 13:00:53,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-18 13:00:53,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:53,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 13:00:53,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:53,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:54,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639330021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:54,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:54,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2022-03-18 13:00:54,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599326021] [2022-03-18 13:00:54,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:54,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 13:00:54,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:54,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 13:00:54,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 13:00:54,127 INFO L87 Difference]: Start difference. First operand 200 states and 236 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:55,379 INFO L93 Difference]: Finished difference Result 244 states and 289 transitions. [2022-03-18 13:00:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 13:00:55,379 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-03-18 13:00:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:55,380 INFO L225 Difference]: With dead ends: 244 [2022-03-18 13:00:55,380 INFO L226 Difference]: Without dead ends: 230 [2022-03-18 13:00:55,382 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=2892, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 13:00:55,382 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 338 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:55,382 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 176 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1760 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 13:00:55,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-18 13:00:55,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 221. [2022-03-18 13:00:55,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 182 states have (on average 1.2087912087912087) internal successors, (220), 202 states have internal predecessors, (220), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2022-03-18 13:00:55,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 262 transitions. [2022-03-18 13:00:55,406 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 262 transitions. Word has length 44 [2022-03-18 13:00:55,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:55,406 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 262 transitions. [2022-03-18 13:00:55,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 262 transitions. [2022-03-18 13:00:55,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 13:00:55,407 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:55,407 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:55,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:55,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:55,624 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:55,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:55,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1915733740, now seen corresponding path program 24 times [2022-03-18 13:00:55,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:55,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862325779] [2022-03-18 13:00:55,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:55,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:55,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:55,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:55,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 13:00:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:55,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:55,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862325779] [2022-03-18 13:00:55,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862325779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:55,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398757218] [2022-03-18 13:00:55,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:00:55,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:55,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:55,828 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:00:55,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 13:00:55,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 13:00:55,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:55,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 13:00:55,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:56,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:00:56,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398757218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:56,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:56,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2022-03-18 13:00:56,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258268287] [2022-03-18 13:00:56,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:56,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 13:00:56,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:56,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 13:00:56,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 13:00:56,666 INFO L87 Difference]: Start difference. First operand 221 states and 262 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:57,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:57,848 INFO L93 Difference]: Finished difference Result 236 states and 277 transitions. [2022-03-18 13:00:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 13:00:57,849 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-03-18 13:00:57,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:57,850 INFO L225 Difference]: With dead ends: 236 [2022-03-18 13:00:57,850 INFO L226 Difference]: Without dead ends: 224 [2022-03-18 13:00:57,851 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=2892, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 13:00:57,851 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 397 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:57,851 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 155 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1539 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 13:00:57,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-18 13:00:57,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2022-03-18 13:00:57,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 183 states have (on average 1.2076502732240437) internal successors, (221), 203 states have internal predecessors, (221), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2022-03-18 13:00:57,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 261 transitions. [2022-03-18 13:00:57,892 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 261 transitions. Word has length 44 [2022-03-18 13:00:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:57,892 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 261 transitions. [2022-03-18 13:00:57,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:00:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 261 transitions. [2022-03-18 13:00:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 13:00:57,894 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:57,894 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:57,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:58,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:58,111 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:58,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:58,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1794700818, now seen corresponding path program 25 times [2022-03-18 13:00:58,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:58,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873243223] [2022-03-18 13:00:58,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:58,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:58,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:58,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:58,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-18 13:00:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 13:00:58,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:58,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873243223] [2022-03-18 13:00:58,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873243223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:58,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007762476] [2022-03-18 13:00:58,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:00:58,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:58,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:58,169 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:00:58,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 13:00:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:58,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 13:00:58,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 13:00:58,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 13:00:58,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007762476] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:58,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:58,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-03-18 13:00:58,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480582450] [2022-03-18 13:00:58,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:58,363 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 13:00:58,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:58,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 13:00:58,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-03-18 13:00:58,363 INFO L87 Difference]: Start difference. First operand 222 states and 261 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:58,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:58,540 INFO L93 Difference]: Finished difference Result 339 states and 391 transitions. [2022-03-18 13:00:58,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 13:00:58,540 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2022-03-18 13:00:58,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:58,541 INFO L225 Difference]: With dead ends: 339 [2022-03-18 13:00:58,541 INFO L226 Difference]: Without dead ends: 215 [2022-03-18 13:00:58,542 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2022-03-18 13:00:58,543 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 55 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:58,543 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 62 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:00:58,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-18 13:00:58,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2022-03-18 13:00:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 174 states have (on average 1.1954022988505748) internal successors, (208), 190 states have internal predecessors, (208), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-03-18 13:00:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 240 transitions. [2022-03-18 13:00:58,586 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 240 transitions. Word has length 44 [2022-03-18 13:00:58,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:58,586 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 240 transitions. [2022-03-18 13:00:58,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:00:58,587 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 240 transitions. [2022-03-18 13:00:58,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 13:00:58,587 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:58,588 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:58,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:58,804 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-18 13:00:58,804 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:58,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:58,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1255089933, now seen corresponding path program 26 times [2022-03-18 13:00:58,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:58,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747148272] [2022-03-18 13:00:58,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:58,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:58,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:58,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:58,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 13:00:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 13:00:58,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:58,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747148272] [2022-03-18 13:00:58,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747148272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:58,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623937044] [2022-03-18 13:00:58,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:00:58,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:58,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:58,868 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:00:58,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 13:00:58,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:00:58,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:58,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 13:00:58,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:00:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 13:00:59,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:00:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 13:00:59,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623937044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:00:59,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:00:59,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-03-18 13:00:59,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104784991] [2022-03-18 13:00:59,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:00:59,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 13:00:59,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:00:59,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 13:00:59,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-03-18 13:00:59,079 INFO L87 Difference]: Start difference. First operand 207 states and 240 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:00:59,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:00:59,223 INFO L93 Difference]: Finished difference Result 233 states and 270 transitions. [2022-03-18 13:00:59,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 13:00:59,224 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-03-18 13:00:59,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:00:59,224 INFO L225 Difference]: With dead ends: 233 [2022-03-18 13:00:59,225 INFO L226 Difference]: Without dead ends: 212 [2022-03-18 13:00:59,225 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2022-03-18 13:00:59,226 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 60 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:00:59,226 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 68 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:00:59,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-18 13:00:59,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-03-18 13:00:59,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.1899441340782122) internal successors, (213), 195 states have internal predecessors, (213), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-03-18 13:00:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 245 transitions. [2022-03-18 13:00:59,252 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 245 transitions. Word has length 44 [2022-03-18 13:00:59,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:00:59,252 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 245 transitions. [2022-03-18 13:00:59,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:00:59,252 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 245 transitions. [2022-03-18 13:00:59,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 13:00:59,254 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:00:59,254 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:00:59,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 13:00:59,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-18 13:00:59,467 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:00:59,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:00:59,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1761268627, now seen corresponding path program 27 times [2022-03-18 13:00:59,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:00:59,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721524639] [2022-03-18 13:00:59,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:00:59,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:00:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:59,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:00:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:59,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:00:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:59,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 13:00:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:00:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:00:59,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:00:59,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721524639] [2022-03-18 13:00:59,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721524639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:00:59,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457364268] [2022-03-18 13:00:59,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:00:59,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:00:59,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:00:59,808 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:00:59,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 13:00:59,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 13:00:59,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:00:59,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 13:00:59,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:01:00,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:01:00,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457364268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:00,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:00,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 33 [2022-03-18 13:01:00,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530179912] [2022-03-18 13:01:00,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:00,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 13:01:00,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:00,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 13:01:00,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=983, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 13:01:00,321 INFO L87 Difference]: Start difference. First operand 212 states and 245 transitions. Second operand has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:01,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:01,486 INFO L93 Difference]: Finished difference Result 270 states and 312 transitions. [2022-03-18 13:01:01,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 13:01:01,486 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-03-18 13:01:01,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:01,488 INFO L225 Difference]: With dead ends: 270 [2022-03-18 13:01:01,488 INFO L226 Difference]: Without dead ends: 264 [2022-03-18 13:01:01,489 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=3101, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 13:01:01,490 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 150 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2653 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:01,490 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 201 Invalid, 2691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2653 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 13:01:01,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-18 13:01:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 228. [2022-03-18 13:01:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 192 states have (on average 1.1875) internal successors, (228), 210 states have internal predecessors, (228), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2022-03-18 13:01:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 264 transitions. [2022-03-18 13:01:01,519 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 264 transitions. Word has length 45 [2022-03-18 13:01:01,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:01,520 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 264 transitions. [2022-03-18 13:01:01,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:01,520 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 264 transitions. [2022-03-18 13:01:01,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 13:01:01,521 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:01,521 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:01,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:01,738 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-18 13:01:01,738 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:01,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:01,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1247111507, now seen corresponding path program 28 times [2022-03-18 13:01:01,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:01,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980735161] [2022-03-18 13:01:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:01,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:01,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:01,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:01,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:01,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 13:01:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:01:02,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:02,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980735161] [2022-03-18 13:01:02,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980735161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:02,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790414408] [2022-03-18 13:01:02,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:01:02,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:02,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:02,064 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:02,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 13:01:02,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:01:02,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:02,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 13:01:02,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:01:02,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:01:02,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790414408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:02,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:02,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 33 [2022-03-18 13:01:02,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163442264] [2022-03-18 13:01:02,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:02,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 13:01:02,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:02,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 13:01:02,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 13:01:02,677 INFO L87 Difference]: Start difference. First operand 228 states and 264 transitions. Second operand has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:03,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:03,654 INFO L93 Difference]: Finished difference Result 234 states and 269 transitions. [2022-03-18 13:01:03,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 13:01:03,655 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-03-18 13:01:03,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:03,656 INFO L225 Difference]: With dead ends: 234 [2022-03-18 13:01:03,656 INFO L226 Difference]: Without dead ends: 212 [2022-03-18 13:01:03,657 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=2873, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 13:01:03,657 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 96 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:03,657 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 176 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1886 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 13:01:03,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-18 13:01:03,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-03-18 13:01:03,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.1899441340782122) internal successors, (213), 195 states have internal predecessors, (213), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2022-03-18 13:01:03,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 246 transitions. [2022-03-18 13:01:03,710 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 246 transitions. Word has length 45 [2022-03-18 13:01:03,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:03,711 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 246 transitions. [2022-03-18 13:01:03,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:03,711 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 246 transitions. [2022-03-18 13:01:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 13:01:03,712 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:03,712 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:03,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:03,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:03,923 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:03,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:03,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1602219117, now seen corresponding path program 29 times [2022-03-18 13:01:03,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:03,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383168693] [2022-03-18 13:01:03,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:03,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:03,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:03,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:04,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 13:01:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:01:04,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:04,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383168693] [2022-03-18 13:01:04,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383168693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:04,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801202158] [2022-03-18 13:01:04,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:01:04,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:04,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:04,196 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:04,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 13:01:04,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-18 13:01:04,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:04,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 13:01:04,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:01:04,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:01:04,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801202158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:04,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:04,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 33 [2022-03-18 13:01:04,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681000507] [2022-03-18 13:01:04,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:04,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 13:01:04,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:04,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 13:01:04,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 13:01:04,868 INFO L87 Difference]: Start difference. First operand 212 states and 246 transitions. Second operand has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:05,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:05,574 INFO L93 Difference]: Finished difference Result 230 states and 267 transitions. [2022-03-18 13:01:05,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 13:01:05,575 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-03-18 13:01:05,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:05,576 INFO L225 Difference]: With dead ends: 230 [2022-03-18 13:01:05,576 INFO L226 Difference]: Without dead ends: 224 [2022-03-18 13:01:05,577 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 76 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=2653, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 13:01:05,577 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:05,577 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 163 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 13:01:05,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-18 13:01:05,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2022-03-18 13:01:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 186 states have (on average 1.1935483870967742) internal successors, (222), 204 states have internal predecessors, (222), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (23), 12 states have call predecessors, (23), 12 states have call successors, (23) [2022-03-18 13:01:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 259 transitions. [2022-03-18 13:01:05,603 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 259 transitions. Word has length 45 [2022-03-18 13:01:05,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:05,603 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 259 transitions. [2022-03-18 13:01:05,603 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:05,604 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 259 transitions. [2022-03-18 13:01:05,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 13:01:05,605 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:05,605 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:05,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:05,821 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-18 13:01:05,822 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:05,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:05,822 INFO L85 PathProgramCache]: Analyzing trace with hash 215774988, now seen corresponding path program 30 times [2022-03-18 13:01:05,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:05,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605689109] [2022-03-18 13:01:05,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:05,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:05,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:05,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:05,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 13:01:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:01:06,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:06,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605689109] [2022-03-18 13:01:06,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605689109] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:06,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77991388] [2022-03-18 13:01:06,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:01:06,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:06,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:06,069 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:06,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 13:01:06,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 13:01:06,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:06,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 13:01:06,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:01:06,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:01:07,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77991388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:07,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:07,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 43 [2022-03-18 13:01:07,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064387283] [2022-03-18 13:01:07,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:07,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 13:01:07,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:07,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 13:01:07,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 13:01:07,061 INFO L87 Difference]: Start difference. First operand 222 states and 259 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:01:08,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:08,383 INFO L93 Difference]: Finished difference Result 268 states and 314 transitions. [2022-03-18 13:01:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 13:01:08,384 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-03-18 13:01:08,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:08,385 INFO L225 Difference]: With dead ends: 268 [2022-03-18 13:01:08,385 INFO L226 Difference]: Without dead ends: 254 [2022-03-18 13:01:08,386 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=376, Invalid=4046, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 13:01:08,387 INFO L912 BasicCegarLoop]: 74 mSDtfsCounter, 482 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:08,389 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 191 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2353 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 13:01:08,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-18 13:01:08,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 245. [2022-03-18 13:01:08,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 226 states have internal predecessors, (246), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (26), 13 states have call predecessors, (26), 13 states have call successors, (26) [2022-03-18 13:01:08,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 287 transitions. [2022-03-18 13:01:08,454 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 287 transitions. Word has length 46 [2022-03-18 13:01:08,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:08,454 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 287 transitions. [2022-03-18 13:01:08,470 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:01:08,470 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 287 transitions. [2022-03-18 13:01:08,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 13:01:08,472 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:08,472 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:08,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:08,672 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-18 13:01:08,672 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:08,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:08,673 INFO L85 PathProgramCache]: Analyzing trace with hash 256944047, now seen corresponding path program 31 times [2022-03-18 13:01:08,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:08,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664738891] [2022-03-18 13:01:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:08,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:08,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:08,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:08,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 13:01:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:01:08,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:08,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664738891] [2022-03-18 13:01:08,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664738891] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:08,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368176814] [2022-03-18 13:01:08,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:01:08,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:08,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:08,926 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:08,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 13:01:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:08,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 13:01:08,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:01:09,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:01:09,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368176814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:09,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:09,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 43 [2022-03-18 13:01:09,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533577772] [2022-03-18 13:01:09,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:09,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 13:01:09,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:09,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 13:01:09,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 13:01:09,655 INFO L87 Difference]: Start difference. First operand 245 states and 287 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:01:11,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:11,190 INFO L93 Difference]: Finished difference Result 260 states and 302 transitions. [2022-03-18 13:01:11,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 13:01:11,191 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-03-18 13:01:11,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:11,192 INFO L225 Difference]: With dead ends: 260 [2022-03-18 13:01:11,192 INFO L226 Difference]: Without dead ends: 248 [2022-03-18 13:01:11,193 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=376, Invalid=4046, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 13:01:11,193 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 493 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:11,194 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 200 Invalid, 2586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2532 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 13:01:11,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-18 13:01:11,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 246. [2022-03-18 13:01:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 207 states have (on average 1.1932367149758454) internal successors, (247), 227 states have internal predecessors, (247), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2022-03-18 13:01:11,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 286 transitions. [2022-03-18 13:01:11,226 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 286 transitions. Word has length 46 [2022-03-18 13:01:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:11,228 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 286 transitions. [2022-03-18 13:01:11,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:01:11,228 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 286 transitions. [2022-03-18 13:01:11,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 13:01:11,229 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:11,229 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:11,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:11,445 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:11,446 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:11,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:11,446 INFO L85 PathProgramCache]: Analyzing trace with hash -521678067, now seen corresponding path program 32 times [2022-03-18 13:01:11,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:11,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154071214] [2022-03-18 13:01:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:11,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:11,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:11,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:11,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 13:01:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 13:01:11,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:11,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154071214] [2022-03-18 13:01:11,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154071214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:11,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508613461] [2022-03-18 13:01:11,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:01:11,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:11,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:11,511 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:11,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 13:01:11,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:01:11,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:11,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 13:01:11,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 13:01:11,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 13:01:11,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508613461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:11,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:11,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2022-03-18 13:01:11,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918230220] [2022-03-18 13:01:11,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:11,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 13:01:11,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:11,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 13:01:11,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-03-18 13:01:11,726 INFO L87 Difference]: Start difference. First operand 246 states and 286 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:01:11,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:11,954 INFO L93 Difference]: Finished difference Result 332 states and 391 transitions. [2022-03-18 13:01:11,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 13:01:11,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2022-03-18 13:01:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:11,956 INFO L225 Difference]: With dead ends: 332 [2022-03-18 13:01:11,956 INFO L226 Difference]: Without dead ends: 302 [2022-03-18 13:01:11,957 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2022-03-18 13:01:11,957 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 67 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:11,958 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 82 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:01:11,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-18 13:01:12,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 284. [2022-03-18 13:01:12,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 245 states have (on average 1.1918367346938776) internal successors, (292), 265 states have internal predecessors, (292), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2022-03-18 13:01:12,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 331 transitions. [2022-03-18 13:01:12,017 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 331 transitions. Word has length 46 [2022-03-18 13:01:12,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:12,017 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 331 transitions. [2022-03-18 13:01:12,017 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:01:12,017 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 331 transitions. [2022-03-18 13:01:12,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 13:01:12,018 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:12,019 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:12,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:12,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:12,235 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:12,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:12,236 INFO L85 PathProgramCache]: Analyzing trace with hash -467445298, now seen corresponding path program 33 times [2022-03-18 13:01:12,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:12,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922267675] [2022-03-18 13:01:12,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:12,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:12,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:12,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:12,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 13:01:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 13:01:12,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:12,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922267675] [2022-03-18 13:01:12,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922267675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:12,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13428042] [2022-03-18 13:01:12,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:01:12,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:12,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:12,306 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:12,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 13:01:12,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 13:01:12,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:12,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 13:01:12,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 13:01:12,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 13:01:12,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13428042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:12,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:12,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2022-03-18 13:01:12,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527304974] [2022-03-18 13:01:12,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:12,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 13:01:12,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:12,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 13:01:12,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-03-18 13:01:12,513 INFO L87 Difference]: Start difference. First operand 284 states and 331 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:12,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:12,710 INFO L93 Difference]: Finished difference Result 525 states and 613 transitions. [2022-03-18 13:01:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 13:01:12,710 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2022-03-18 13:01:12,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:12,711 INFO L225 Difference]: With dead ends: 525 [2022-03-18 13:01:12,711 INFO L226 Difference]: Without dead ends: 340 [2022-03-18 13:01:12,713 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2022-03-18 13:01:12,717 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 107 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:12,718 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 57 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:01:12,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-03-18 13:01:12,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 322. [2022-03-18 13:01:12,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 283 states have (on average 1.1908127208480566) internal successors, (337), 303 states have internal predecessors, (337), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2022-03-18 13:01:12,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 376 transitions. [2022-03-18 13:01:12,769 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 376 transitions. Word has length 46 [2022-03-18 13:01:12,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:12,770 INFO L478 AbstractCegarLoop]: Abstraction has 322 states and 376 transitions. [2022-03-18 13:01:12,771 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:12,771 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 376 transitions. [2022-03-18 13:01:12,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 13:01:12,772 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:12,772 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:12,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:12,989 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-18 13:01:12,989 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:12,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:12,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1644141558, now seen corresponding path program 34 times [2022-03-18 13:01:12,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:12,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680318957] [2022-03-18 13:01:12,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:12,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:13,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:13,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:13,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 13:01:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:13,490 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:01:13,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:13,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680318957] [2022-03-18 13:01:13,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680318957] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:13,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852736970] [2022-03-18 13:01:13,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:01:13,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:13,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:13,491 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:13,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 13:01:13,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:01:13,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:13,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 13:01:13,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:01:13,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:01:13,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852736970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:13,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:13,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 35 [2022-03-18 13:01:13,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943699516] [2022-03-18 13:01:13,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:13,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 13:01:13,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:13,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 13:01:13,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1113, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 13:01:13,977 INFO L87 Difference]: Start difference. First operand 322 states and 376 transitions. Second operand has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:15,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:15,248 INFO L93 Difference]: Finished difference Result 392 states and 457 transitions. [2022-03-18 13:01:15,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 13:01:15,249 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-03-18 13:01:15,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:15,250 INFO L225 Difference]: With dead ends: 392 [2022-03-18 13:01:15,250 INFO L226 Difference]: Without dead ends: 386 [2022-03-18 13:01:15,251 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=3565, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 13:01:15,252 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 175 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3231 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 3271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:15,252 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 218 Invalid, 3271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3231 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 13:01:15,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-03-18 13:01:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 338. [2022-03-18 13:01:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 296 states have (on average 1.1891891891891893) internal successors, (352), 318 states have internal predecessors, (352), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (27), 14 states have call predecessors, (27), 14 states have call successors, (27) [2022-03-18 13:01:15,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 395 transitions. [2022-03-18 13:01:15,309 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 395 transitions. Word has length 47 [2022-03-18 13:01:15,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:15,310 INFO L478 AbstractCegarLoop]: Abstraction has 338 states and 395 transitions. [2022-03-18 13:01:15,310 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 395 transitions. [2022-03-18 13:01:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 13:01:15,311 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:15,311 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:15,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:15,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:15,527 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:15,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:15,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1497239530, now seen corresponding path program 35 times [2022-03-18 13:01:15,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:15,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863724075] [2022-03-18 13:01:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:15,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:15,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:15,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:15,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 13:01:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:01:15,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:15,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863724075] [2022-03-18 13:01:15,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863724075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:15,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891865780] [2022-03-18 13:01:15,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:01:15,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:15,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:15,833 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:15,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 13:01:15,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-18 13:01:15,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:15,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 13:01:15,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:01:16,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:01:16,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891865780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:16,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:16,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 35 [2022-03-18 13:01:16,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653709552] [2022-03-18 13:01:16,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:16,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 13:01:16,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:16,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 13:01:16,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 13:01:16,290 INFO L87 Difference]: Start difference. First operand 338 states and 395 transitions. Second operand has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:17,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:17,403 INFO L93 Difference]: Finished difference Result 344 states and 400 transitions. [2022-03-18 13:01:17,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 13:01:17,404 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-03-18 13:01:17,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:17,405 INFO L225 Difference]: With dead ends: 344 [2022-03-18 13:01:17,405 INFO L226 Difference]: Without dead ends: 322 [2022-03-18 13:01:17,406 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=3321, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 13:01:17,406 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 121 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2191 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:17,406 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 185 Invalid, 2224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2191 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 13:01:17,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-03-18 13:01:17,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2022-03-18 13:01:17,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 283 states have (on average 1.1908127208480566) internal successors, (337), 303 states have internal predecessors, (337), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2022-03-18 13:01:17,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 377 transitions. [2022-03-18 13:01:17,456 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 377 transitions. Word has length 47 [2022-03-18 13:01:17,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:17,456 INFO L478 AbstractCegarLoop]: Abstraction has 322 states and 377 transitions. [2022-03-18 13:01:17,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:17,456 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 377 transitions. [2022-03-18 13:01:17,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 13:01:17,458 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:17,458 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:17,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:17,674 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-18 13:01:17,674 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:17,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:17,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1271699905, now seen corresponding path program 36 times [2022-03-18 13:01:17,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:17,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519876820] [2022-03-18 13:01:17,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:17,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:17,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:17,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:17,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 13:01:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 13:01:17,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:17,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519876820] [2022-03-18 13:01:17,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519876820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:17,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619678409] [2022-03-18 13:01:17,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:01:17,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:17,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:17,872 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:17,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-18 13:01:17,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-18 13:01:17,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:17,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 13:01:17,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 13:01:18,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 13:01:18,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619678409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:18,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:18,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 33 [2022-03-18 13:01:18,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452048951] [2022-03-18 13:01:18,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:18,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 13:01:18,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:18,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 13:01:18,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 13:01:18,501 INFO L87 Difference]: Start difference. First operand 322 states and 377 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:01:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:19,232 INFO L93 Difference]: Finished difference Result 378 states and 443 transitions. [2022-03-18 13:01:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 13:01:19,232 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-03-18 13:01:19,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:19,234 INFO L225 Difference]: With dead ends: 378 [2022-03-18 13:01:19,234 INFO L226 Difference]: Without dead ends: 362 [2022-03-18 13:01:19,236 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 13:01:19,236 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 270 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:19,236 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 151 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 13:01:19,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-18 13:01:19,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 357. [2022-03-18 13:01:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 303 states have (on average 1.174917491749175) internal successors, (356), 333 states have internal predecessors, (356), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2022-03-18 13:01:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 416 transitions. [2022-03-18 13:01:19,315 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 416 transitions. Word has length 47 [2022-03-18 13:01:19,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:19,315 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 416 transitions. [2022-03-18 13:01:19,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:01:19,316 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 416 transitions. [2022-03-18 13:01:19,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 13:01:19,318 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:19,318 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:19,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:19,534 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:19,534 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:19,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:19,535 INFO L85 PathProgramCache]: Analyzing trace with hash 83484810, now seen corresponding path program 37 times [2022-03-18 13:01:19,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:19,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947174319] [2022-03-18 13:01:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:19,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:19,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:19,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:19,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 13:01:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:01:19,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:19,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947174319] [2022-03-18 13:01:19,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947174319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:19,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097651431] [2022-03-18 13:01:19,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:01:19,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:19,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:19,883 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:19,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-18 13:01:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:19,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 13:01:19,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:01:20,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:01:20,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097651431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:20,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:20,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 35 [2022-03-18 13:01:20,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809263870] [2022-03-18 13:01:20,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:20,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 13:01:20,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:20,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 13:01:20,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 13:01:20,341 INFO L87 Difference]: Start difference. First operand 357 states and 416 transitions. Second operand has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:20,942 INFO L93 Difference]: Finished difference Result 375 states and 438 transitions. [2022-03-18 13:01:20,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 13:01:20,942 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-03-18 13:01:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:20,944 INFO L225 Difference]: With dead ends: 375 [2022-03-18 13:01:20,944 INFO L226 Difference]: Without dead ends: 359 [2022-03-18 13:01:20,952 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=221, Invalid=3085, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 13:01:20,952 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:20,952 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 158 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 13:01:20,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-03-18 13:01:21,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 354. [2022-03-18 13:01:21,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 300 states have (on average 1.18) internal successors, (354), 330 states have internal predecessors, (354), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2022-03-18 13:01:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 414 transitions. [2022-03-18 13:01:21,029 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 414 transitions. Word has length 47 [2022-03-18 13:01:21,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:21,030 INFO L478 AbstractCegarLoop]: Abstraction has 354 states and 414 transitions. [2022-03-18 13:01:21,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:21,030 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 414 transitions. [2022-03-18 13:01:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 13:01:21,032 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:21,032 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:21,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:21,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-18 13:01:21,251 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:21,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:21,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1251929861, now seen corresponding path program 38 times [2022-03-18 13:01:21,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:21,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009739870] [2022-03-18 13:01:21,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:21,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:21,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:21,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:21,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 13:01:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 13:01:21,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:21,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009739870] [2022-03-18 13:01:21,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009739870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:21,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457866282] [2022-03-18 13:01:21,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:01:21,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:21,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:21,439 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:21,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-18 13:01:21,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:01:21,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:21,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 13:01:21,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 13:01:21,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 13:01:22,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457866282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:22,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:22,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 33 [2022-03-18 13:01:22,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885106147] [2022-03-18 13:01:22,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:22,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 13:01:22,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:22,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 13:01:22,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 13:01:22,072 INFO L87 Difference]: Start difference. First operand 354 states and 414 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:01:22,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:22,949 INFO L93 Difference]: Finished difference Result 368 states and 427 transitions. [2022-03-18 13:01:22,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 13:01:22,949 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-03-18 13:01:22,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:22,951 INFO L225 Difference]: With dead ends: 368 [2022-03-18 13:01:22,951 INFO L226 Difference]: Without dead ends: 346 [2022-03-18 13:01:22,953 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 13:01:22,953 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 328 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:22,953 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 137 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 13:01:22,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-03-18 13:01:23,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 344. [2022-03-18 13:01:23,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 290 states have (on average 1.1793103448275861) internal successors, (342), 320 states have internal predecessors, (342), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2022-03-18 13:01:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 398 transitions. [2022-03-18 13:01:23,007 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 398 transitions. Word has length 47 [2022-03-18 13:01:23,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:23,008 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 398 transitions. [2022-03-18 13:01:23,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:01:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 398 transitions. [2022-03-18 13:01:23,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-18 13:01:23,010 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:23,010 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:23,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:23,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-18 13:01:23,223 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:23,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:23,224 INFO L85 PathProgramCache]: Analyzing trace with hash -448253169, now seen corresponding path program 39 times [2022-03-18 13:01:23,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:23,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023983405] [2022-03-18 13:01:23,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:23,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:23,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:23,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:23,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 13:01:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:01:23,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:23,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023983405] [2022-03-18 13:01:23,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023983405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:23,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253485928] [2022-03-18 13:01:23,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:01:23,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:23,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:23,530 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:23,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-18 13:01:23,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-18 13:01:23,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:23,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 13:01:23,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:01:24,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:01:24,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253485928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:24,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:24,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-18 13:01:24,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436355360] [2022-03-18 13:01:24,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:24,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 13:01:24,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:24,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 13:01:24,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2193, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 13:01:24,508 INFO L87 Difference]: Start difference. First operand 344 states and 398 transitions. Second operand has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:01:26,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:26,626 INFO L93 Difference]: Finished difference Result 410 states and 477 transitions. [2022-03-18 13:01:26,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 13:01:26,626 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-03-18 13:01:26,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:26,628 INFO L225 Difference]: With dead ends: 410 [2022-03-18 13:01:26,628 INFO L226 Difference]: Without dead ends: 396 [2022-03-18 13:01:26,630 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=458, Invalid=5394, Unknown=0, NotChecked=0, Total=5852 [2022-03-18 13:01:26,630 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 600 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3293 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 3374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:26,631 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 226 Invalid, 3374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3293 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 13:01:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-03-18 13:01:26,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 387. [2022-03-18 13:01:26,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 327 states have (on average 1.1773700305810397) internal successors, (385), 361 states have internal predecessors, (385), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) [2022-03-18 13:01:26,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 449 transitions. [2022-03-18 13:01:26,692 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 449 transitions. Word has length 48 [2022-03-18 13:01:26,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:26,692 INFO L478 AbstractCegarLoop]: Abstraction has 387 states and 449 transitions. [2022-03-18 13:01:26,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:01:26,692 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 449 transitions. [2022-03-18 13:01:26,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-18 13:01:26,694 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:26,694 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:26,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:26,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-18 13:01:26,911 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:26,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:26,911 INFO L85 PathProgramCache]: Analyzing trace with hash 827987660, now seen corresponding path program 40 times [2022-03-18 13:01:26,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:26,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189336583] [2022-03-18 13:01:26,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:26,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:26,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:26,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:27,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 13:01:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:01:27,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:27,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189336583] [2022-03-18 13:01:27,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189336583] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:27,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857964692] [2022-03-18 13:01:27,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:01:27,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:27,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:27,161 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:27,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-18 13:01:27,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:01:27,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:27,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 13:01:27,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:01:27,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:01:28,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857964692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:28,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:28,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-18 13:01:28,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347164033] [2022-03-18 13:01:28,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:28,167 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 13:01:28,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:28,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 13:01:28,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2193, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 13:01:28,167 INFO L87 Difference]: Start difference. First operand 387 states and 449 transitions. Second operand has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:01:29,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:29,718 INFO L93 Difference]: Finished difference Result 402 states and 464 transitions. [2022-03-18 13:01:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 13:01:29,718 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-03-18 13:01:29,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:29,720 INFO L225 Difference]: With dead ends: 402 [2022-03-18 13:01:29,720 INFO L226 Difference]: Without dead ends: 390 [2022-03-18 13:01:29,722 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=458, Invalid=5394, Unknown=0, NotChecked=0, Total=5852 [2022-03-18 13:01:29,722 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 691 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2959 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 3028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:29,722 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 210 Invalid, 3028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2959 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 13:01:29,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-03-18 13:01:29,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 388. [2022-03-18 13:01:29,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 328 states have (on average 1.1768292682926829) internal successors, (386), 362 states have internal predecessors, (386), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2022-03-18 13:01:29,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 447 transitions. [2022-03-18 13:01:29,788 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 447 transitions. Word has length 48 [2022-03-18 13:01:29,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:29,789 INFO L478 AbstractCegarLoop]: Abstraction has 388 states and 447 transitions. [2022-03-18 13:01:29,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:01:29,789 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 447 transitions. [2022-03-18 13:01:29,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-18 13:01:29,791 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:29,791 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:29,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:30,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-18 13:01:30,008 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:30,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:30,008 INFO L85 PathProgramCache]: Analyzing trace with hash 179082418, now seen corresponding path program 41 times [2022-03-18 13:01:30,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:30,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592670336] [2022-03-18 13:01:30,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:30,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:30,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:30,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:30,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 13:01:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 13:01:30,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:30,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592670336] [2022-03-18 13:01:30,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592670336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:30,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813034406] [2022-03-18 13:01:30,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:01:30,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:30,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:30,076 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:30,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-18 13:01:30,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-18 13:01:30,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:30,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 13:01:30,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 13:01:30,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 13:01:30,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813034406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:30,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:30,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 16 [2022-03-18 13:01:30,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512850481] [2022-03-18 13:01:30,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:30,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 13:01:30,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:30,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 13:01:30,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-03-18 13:01:30,243 INFO L87 Difference]: Start difference. First operand 388 states and 447 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:30,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:30,483 INFO L93 Difference]: Finished difference Result 593 states and 672 transitions. [2022-03-18 13:01:30,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 13:01:30,483 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2022-03-18 13:01:30,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:30,485 INFO L225 Difference]: With dead ends: 593 [2022-03-18 13:01:30,485 INFO L226 Difference]: Without dead ends: 383 [2022-03-18 13:01:30,487 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2022-03-18 13:01:30,487 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 75 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:30,487 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 66 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:01:30,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-03-18 13:01:30,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 375. [2022-03-18 13:01:30,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 321 states have (on average 1.1682242990654206) internal successors, (375), 351 states have internal predecessors, (375), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2022-03-18 13:01:30,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 428 transitions. [2022-03-18 13:01:30,551 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 428 transitions. Word has length 48 [2022-03-18 13:01:30,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:30,551 INFO L478 AbstractCegarLoop]: Abstraction has 375 states and 428 transitions. [2022-03-18 13:01:30,551 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:30,551 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 428 transitions. [2022-03-18 13:01:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-18 13:01:30,553 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:30,553 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:30,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:30,769 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:30,770 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:30,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:30,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2046793773, now seen corresponding path program 42 times [2022-03-18 13:01:30,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:30,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320313440] [2022-03-18 13:01:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:30,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:30,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:30,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:30,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 13:01:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 13:01:30,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:30,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320313440] [2022-03-18 13:01:30,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320313440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:30,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526601343] [2022-03-18 13:01:30,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:01:30,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:30,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:30,849 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:30,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-18 13:01:30,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-18 13:01:30,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:30,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 13:01:30,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 13:01:30,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 13:01:30,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526601343] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:30,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:30,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 16 [2022-03-18 13:01:30,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730409297] [2022-03-18 13:01:30,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:30,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 13:01:30,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:30,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 13:01:30,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-03-18 13:01:30,997 INFO L87 Difference]: Start difference. First operand 375 states and 428 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:01:31,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:31,244 INFO L93 Difference]: Finished difference Result 409 states and 468 transitions. [2022-03-18 13:01:31,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 13:01:31,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-03-18 13:01:31,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:31,247 INFO L225 Difference]: With dead ends: 409 [2022-03-18 13:01:31,247 INFO L226 Difference]: Without dead ends: 382 [2022-03-18 13:01:31,249 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2022-03-18 13:01:31,257 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 84 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:31,257 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 60 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:01:31,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-03-18 13:01:31,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2022-03-18 13:01:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 328 states have (on average 1.1646341463414633) internal successors, (382), 358 states have internal predecessors, (382), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2022-03-18 13:01:31,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 435 transitions. [2022-03-18 13:01:31,366 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 435 transitions. Word has length 48 [2022-03-18 13:01:31,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:31,366 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 435 transitions. [2022-03-18 13:01:31,366 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:01:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 435 transitions. [2022-03-18 13:01:31,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 13:01:31,368 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:31,368 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:31,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-18 13:01:31,584 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:31,585 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:31,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:31,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1121658739, now seen corresponding path program 43 times [2022-03-18 13:01:31,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:31,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363488137] [2022-03-18 13:01:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:31,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:31,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:31,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:31,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 13:01:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:32,037 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:01:32,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:32,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363488137] [2022-03-18 13:01:32,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363488137] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:32,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287157202] [2022-03-18 13:01:32,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:01:32,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:32,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:32,038 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:32,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-18 13:01:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:32,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 13:01:32,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:01:32,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:01:32,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287157202] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:32,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:32,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 37 [2022-03-18 13:01:32,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308289433] [2022-03-18 13:01:32,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:32,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 13:01:32,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:32,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 13:01:32,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 13:01:32,605 INFO L87 Difference]: Start difference. First operand 382 states and 435 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:34,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:34,325 INFO L93 Difference]: Finished difference Result 460 states and 524 transitions. [2022-03-18 13:01:34,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 13:01:34,326 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-03-18 13:01:34,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:34,328 INFO L225 Difference]: With dead ends: 460 [2022-03-18 13:01:34,328 INFO L226 Difference]: Without dead ends: 454 [2022-03-18 13:01:34,329 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=229, Invalid=4061, Unknown=0, NotChecked=0, Total=4290 [2022-03-18 13:01:34,330 INFO L912 BasicCegarLoop]: 89 mSDtfsCounter, 195 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 4009 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 4053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 4009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:34,330 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 241 Invalid, 4053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 4009 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 13:01:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-03-18 13:01:34,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 398. [2022-03-18 13:01:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 341 states have (on average 1.1642228739002933) internal successors, (397), 373 states have internal predecessors, (397), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2022-03-18 13:01:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 454 transitions. [2022-03-18 13:01:34,400 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 454 transitions. Word has length 49 [2022-03-18 13:01:34,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:34,400 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 454 transitions. [2022-03-18 13:01:34,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:34,400 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 454 transitions. [2022-03-18 13:01:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 13:01:34,402 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:34,402 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:34,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-18 13:01:34,610 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-18 13:01:34,610 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:34,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:34,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1142562995, now seen corresponding path program 44 times [2022-03-18 13:01:34,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:34,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543483018] [2022-03-18 13:01:34,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:34,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:34,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:34,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:34,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 13:01:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:01:34,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:34,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543483018] [2022-03-18 13:01:34,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543483018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:34,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606888588] [2022-03-18 13:01:34,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:01:34,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:34,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:35,012 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:35,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-18 13:01:35,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:01:35,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:35,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 13:01:35,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:01:35,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:01:35,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606888588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:35,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:35,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 37 [2022-03-18 13:01:35,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750538577] [2022-03-18 13:01:35,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:35,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 13:01:35,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:35,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 13:01:35,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1247, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 13:01:35,703 INFO L87 Difference]: Start difference. First operand 398 states and 454 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:37,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:37,086 INFO L93 Difference]: Finished difference Result 404 states and 459 transitions. [2022-03-18 13:01:37,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 13:01:37,086 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-03-18 13:01:37,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:37,088 INFO L225 Difference]: With dead ends: 404 [2022-03-18 13:01:37,088 INFO L226 Difference]: Without dead ends: 382 [2022-03-18 13:01:37,090 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=231, Invalid=3801, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 13:01:37,090 INFO L912 BasicCegarLoop]: 74 mSDtfsCounter, 135 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 3203 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 3234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:37,090 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 221 Invalid, 3234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3203 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 13:01:37,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-03-18 13:01:37,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2022-03-18 13:01:37,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 328 states have (on average 1.1646341463414633) internal successors, (382), 358 states have internal predecessors, (382), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (34), 18 states have call predecessors, (34), 18 states have call successors, (34) [2022-03-18 13:01:37,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 436 transitions. [2022-03-18 13:01:37,172 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 436 transitions. Word has length 49 [2022-03-18 13:01:37,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:37,172 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 436 transitions. [2022-03-18 13:01:37,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:37,172 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 436 transitions. [2022-03-18 13:01:37,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 13:01:37,174 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:37,174 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:37,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:37,381 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:37,382 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:37,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:37,382 INFO L85 PathProgramCache]: Analyzing trace with hash 690493581, now seen corresponding path program 45 times [2022-03-18 13:01:37,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:37,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132529053] [2022-03-18 13:01:37,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:37,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:37,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:37,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:37,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 13:01:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:01:37,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:37,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132529053] [2022-03-18 13:01:37,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132529053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:37,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795706358] [2022-03-18 13:01:37,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:01:37,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:37,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:37,681 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:37,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-18 13:01:37,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 13:01:37,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:37,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 13:01:37,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:01:38,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:01:38,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795706358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:38,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:38,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 37 [2022-03-18 13:01:38,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485669128] [2022-03-18 13:01:38,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:38,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 13:01:38,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:38,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 13:01:38,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1243, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 13:01:38,286 INFO L87 Difference]: Start difference. First operand 382 states and 436 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:39,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:39,069 INFO L93 Difference]: Finished difference Result 388 states and 441 transitions. [2022-03-18 13:01:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 13:01:39,070 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-03-18 13:01:39,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:39,071 INFO L225 Difference]: With dead ends: 388 [2022-03-18 13:01:39,071 INFO L226 Difference]: Without dead ends: 364 [2022-03-18 13:01:39,072 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=3549, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 13:01:39,073 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 95 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2186 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:39,073 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 191 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2186 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 13:01:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-03-18 13:01:39,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-03-18 13:01:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 313 states have (on average 1.1661341853035143) internal successors, (365), 341 states have internal predecessors, (365), 19 states have call successors, (19), 5 states have call predecessors, (19), 31 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) [2022-03-18 13:01:39,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 416 transitions. [2022-03-18 13:01:39,147 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 416 transitions. Word has length 49 [2022-03-18 13:01:39,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:39,147 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 416 transitions. [2022-03-18 13:01:39,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:39,147 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 416 transitions. [2022-03-18 13:01:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 13:01:39,149 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:39,149 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:39,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-18 13:01:39,365 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-18 13:01:39,366 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:39,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:39,366 INFO L85 PathProgramCache]: Analyzing trace with hash 375234381, now seen corresponding path program 46 times [2022-03-18 13:01:39,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:39,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824871654] [2022-03-18 13:01:39,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:39,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:39,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:39,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:39,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 13:01:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:01:39,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:39,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824871654] [2022-03-18 13:01:39,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824871654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:39,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132708723] [2022-03-18 13:01:39,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:01:39,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:39,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:39,617 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:39,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-18 13:01:39,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:01:39,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:39,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 13:01:39,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:01:40,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:01:40,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132708723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:40,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:40,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 37 [2022-03-18 13:01:40,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882079317] [2022-03-18 13:01:40,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:40,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 13:01:40,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:40,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 13:01:40,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 13:01:40,395 INFO L87 Difference]: Start difference. First operand 364 states and 416 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:41,166 INFO L93 Difference]: Finished difference Result 382 states and 437 transitions. [2022-03-18 13:01:41,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 13:01:41,167 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-03-18 13:01:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:41,169 INFO L225 Difference]: With dead ends: 382 [2022-03-18 13:01:41,169 INFO L226 Difference]: Without dead ends: 376 [2022-03-18 13:01:41,171 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 13:01:41,171 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:41,171 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 153 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 13:01:41,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-03-18 13:01:41,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 374. [2022-03-18 13:01:41,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 320 states have (on average 1.16875) internal successors, (374), 350 states have internal predecessors, (374), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (35), 18 states have call predecessors, (35), 18 states have call successors, (35) [2022-03-18 13:01:41,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 429 transitions. [2022-03-18 13:01:41,260 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 429 transitions. Word has length 49 [2022-03-18 13:01:41,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:41,260 INFO L478 AbstractCegarLoop]: Abstraction has 374 states and 429 transitions. [2022-03-18 13:01:41,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:41,261 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 429 transitions. [2022-03-18 13:01:41,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 13:01:41,263 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:41,263 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:41,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:41,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:41,475 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:41,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:41,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1431154964, now seen corresponding path program 47 times [2022-03-18 13:01:41,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:41,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694859168] [2022-03-18 13:01:41,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:41,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:41,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:41,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:41,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 13:01:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:01:41,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:41,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694859168] [2022-03-18 13:01:41,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694859168] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:41,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447603014] [2022-03-18 13:01:41,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:01:41,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:41,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:41,756 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:41,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-18 13:01:41,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-18 13:01:41,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:41,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 13:01:41,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:01:42,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:01:42,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447603014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:42,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:42,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 55 [2022-03-18 13:01:42,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208035520] [2022-03-18 13:01:42,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:42,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 13:01:42,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:42,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 13:01:42,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2790, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 13:01:42,911 INFO L87 Difference]: Start difference. First operand 374 states and 429 transitions. Second operand has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:01:45,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:45,085 INFO L93 Difference]: Finished difference Result 442 states and 510 transitions. [2022-03-18 13:01:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 13:01:45,086 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-03-18 13:01:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:45,088 INFO L225 Difference]: With dead ends: 442 [2022-03-18 13:01:45,088 INFO L226 Difference]: Without dead ends: 428 [2022-03-18 13:01:45,090 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=546, Invalid=6936, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 13:01:45,090 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 843 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3795 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 3895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:45,090 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 236 Invalid, 3895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3795 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 13:01:45,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-03-18 13:01:45,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 419. [2022-03-18 13:01:45,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 359 states have (on average 1.1671309192200556) internal successors, (419), 393 states have internal predecessors, (419), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (41), 20 states have call predecessors, (41), 20 states have call successors, (41) [2022-03-18 13:01:45,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 482 transitions. [2022-03-18 13:01:45,212 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 482 transitions. Word has length 50 [2022-03-18 13:01:45,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:45,212 INFO L478 AbstractCegarLoop]: Abstraction has 419 states and 482 transitions. [2022-03-18 13:01:45,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:01:45,212 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 482 transitions. [2022-03-18 13:01:45,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 13:01:45,231 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:45,231 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:45,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:45,432 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:45,432 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:45,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:45,432 INFO L85 PathProgramCache]: Analyzing trace with hash -522394929, now seen corresponding path program 48 times [2022-03-18 13:01:45,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:45,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610716595] [2022-03-18 13:01:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:45,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:45,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:45,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:45,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-18 13:01:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:01:45,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:45,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610716595] [2022-03-18 13:01:45,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610716595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:45,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951764188] [2022-03-18 13:01:45,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:01:45,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:45,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:45,730 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:45,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-18 13:01:45,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 13:01:45,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:45,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 13:01:45,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:01:46,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:01:46,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951764188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:46,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:46,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 55 [2022-03-18 13:01:46,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901998266] [2022-03-18 13:01:46,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:46,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 13:01:46,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 13:01:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2790, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 13:01:46,701 INFO L87 Difference]: Start difference. First operand 419 states and 482 transitions. Second operand has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:01:48,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:48,545 INFO L93 Difference]: Finished difference Result 434 states and 497 transitions. [2022-03-18 13:01:48,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 13:01:48,546 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-03-18 13:01:48,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:48,547 INFO L225 Difference]: With dead ends: 434 [2022-03-18 13:01:48,547 INFO L226 Difference]: Without dead ends: 422 [2022-03-18 13:01:48,550 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=546, Invalid=6936, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 13:01:48,550 INFO L912 BasicCegarLoop]: 98 mSDtfsCounter, 880 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 3553 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 3639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:48,550 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [895 Valid, 230 Invalid, 3639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3553 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 13:01:48,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-03-18 13:01:48,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 420. [2022-03-18 13:01:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 360 states have (on average 1.1666666666666667) internal successors, (420), 394 states have internal predecessors, (420), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-03-18 13:01:48,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 480 transitions. [2022-03-18 13:01:48,640 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 480 transitions. Word has length 50 [2022-03-18 13:01:48,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:48,640 INFO L478 AbstractCegarLoop]: Abstraction has 420 states and 480 transitions. [2022-03-18 13:01:48,640 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:01:48,640 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 480 transitions. [2022-03-18 13:01:48,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 13:01:48,645 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:48,645 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:48,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:48,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-18 13:01:48,851 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:48,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:48,852 INFO L85 PathProgramCache]: Analyzing trace with hash 96500781, now seen corresponding path program 49 times [2022-03-18 13:01:48,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:48,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181840775] [2022-03-18 13:01:48,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:48,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:48,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:48,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:48,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 13:01:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 13:01:48,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:48,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181840775] [2022-03-18 13:01:48,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181840775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:48,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414384809] [2022-03-18 13:01:48,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:01:48,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:48,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:48,928 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:48,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-18 13:01:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:48,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 13:01:48,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 13:01:49,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 13:01:49,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414384809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:49,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:49,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-03-18 13:01:49,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538466846] [2022-03-18 13:01:49,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:49,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 13:01:49,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:49,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 13:01:49,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-03-18 13:01:49,155 INFO L87 Difference]: Start difference. First operand 420 states and 480 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:01:49,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:49,488 INFO L93 Difference]: Finished difference Result 540 states and 625 transitions. [2022-03-18 13:01:49,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 13:01:49,488 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-03-18 13:01:49,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:49,490 INFO L225 Difference]: With dead ends: 540 [2022-03-18 13:01:49,490 INFO L226 Difference]: Without dead ends: 502 [2022-03-18 13:01:49,494 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 13:01:49,494 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 92 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:49,495 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 81 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:01:49,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-03-18 13:01:49,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 478. [2022-03-18 13:01:49,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 418 states have (on average 1.1650717703349283) internal successors, (487), 452 states have internal predecessors, (487), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-03-18 13:01:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 547 transitions. [2022-03-18 13:01:49,598 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 547 transitions. Word has length 50 [2022-03-18 13:01:49,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:49,598 INFO L478 AbstractCegarLoop]: Abstraction has 478 states and 547 transitions. [2022-03-18 13:01:49,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:01:49,598 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 547 transitions. [2022-03-18 13:01:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 13:01:49,600 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:49,601 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:49,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:49,817 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-18 13:01:49,817 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:49,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:49,818 INFO L85 PathProgramCache]: Analyzing trace with hash -2133989358, now seen corresponding path program 50 times [2022-03-18 13:01:49,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:49,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254740319] [2022-03-18 13:01:49,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:49,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:49,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:49,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:49,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-18 13:01:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 13:01:49,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:49,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254740319] [2022-03-18 13:01:49,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254740319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:49,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384428716] [2022-03-18 13:01:49,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:01:49,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:49,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:49,882 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:49,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-18 13:01:49,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:01:49,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:49,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 13:01:49,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 13:01:50,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 13:01:50,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384428716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:50,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:50,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-03-18 13:01:50,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964010972] [2022-03-18 13:01:50,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:50,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 13:01:50,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:50,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 13:01:50,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-03-18 13:01:50,090 INFO L87 Difference]: Start difference. First operand 478 states and 547 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:50,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:50,488 INFO L93 Difference]: Finished difference Result 857 states and 980 transitions. [2022-03-18 13:01:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 13:01:50,488 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-03-18 13:01:50,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:50,491 INFO L225 Difference]: With dead ends: 857 [2022-03-18 13:01:50,492 INFO L226 Difference]: Without dead ends: 560 [2022-03-18 13:01:50,493 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 13:01:50,494 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 112 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:50,494 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 81 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:01:50,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-03-18 13:01:50,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 536. [2022-03-18 13:01:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 476 states have (on average 1.1638655462184875) internal successors, (554), 510 states have internal predecessors, (554), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-03-18 13:01:50,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 614 transitions. [2022-03-18 13:01:50,613 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 614 transitions. Word has length 50 [2022-03-18 13:01:50,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:50,613 INFO L478 AbstractCegarLoop]: Abstraction has 536 states and 614 transitions. [2022-03-18 13:01:50,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:50,614 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 614 transitions. [2022-03-18 13:01:50,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 13:01:50,616 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:50,616 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:50,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:50,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-18 13:01:50,831 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:50,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:50,832 INFO L85 PathProgramCache]: Analyzing trace with hash -33846038, now seen corresponding path program 51 times [2022-03-18 13:01:50,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:50,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144888716] [2022-03-18 13:01:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:50,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:50,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:50,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:51,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-18 13:01:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:01:51,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:51,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144888716] [2022-03-18 13:01:51,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144888716] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:51,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888936278] [2022-03-18 13:01:51,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:01:51,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:51,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:51,332 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:51,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-18 13:01:51,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-18 13:01:51,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:51,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-18 13:01:51,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:01:51,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:01:51,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888936278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:51,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:51,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 39 [2022-03-18 13:01:51,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558081935] [2022-03-18 13:01:51,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:51,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 13:01:51,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:51,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 13:01:51,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 13:01:51,947 INFO L87 Difference]: Start difference. First operand 536 states and 614 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:54,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:54,073 INFO L93 Difference]: Finished difference Result 628 states and 719 transitions. [2022-03-18 13:01:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 13:01:54,073 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-03-18 13:01:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:54,075 INFO L225 Difference]: With dead ends: 628 [2022-03-18 13:01:54,076 INFO L226 Difference]: Without dead ends: 622 [2022-03-18 13:01:54,077 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=241, Invalid=4589, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 13:01:54,078 INFO L912 BasicCegarLoop]: 101 mSDtfsCounter, 219 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 5307 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 5353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:54,078 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 278 Invalid, 5353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5307 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 13:01:54,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-03-18 13:01:54,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 552. [2022-03-18 13:01:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 489 states have (on average 1.16359918200409) internal successors, (569), 525 states have internal predecessors, (569), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (41), 21 states have call predecessors, (41), 21 states have call successors, (41) [2022-03-18 13:01:54,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 633 transitions. [2022-03-18 13:01:54,205 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 633 transitions. Word has length 51 [2022-03-18 13:01:54,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:54,205 INFO L478 AbstractCegarLoop]: Abstraction has 552 states and 633 transitions. [2022-03-18 13:01:54,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:54,205 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 633 transitions. [2022-03-18 13:01:54,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 13:01:54,208 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:54,208 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:54,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:54,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:54,424 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:54,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:54,425 INFO L85 PathProgramCache]: Analyzing trace with hash 2139086154, now seen corresponding path program 52 times [2022-03-18 13:01:54,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:54,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172526759] [2022-03-18 13:01:54,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:54,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:54,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:54,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:54,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-18 13:01:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:01:54,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:54,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172526759] [2022-03-18 13:01:54,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172526759] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:54,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165507267] [2022-03-18 13:01:54,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:01:54,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:54,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:54,871 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:54,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-18 13:01:54,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:01:54,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:54,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 13:01:54,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:01:55,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:01:55,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165507267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:55,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:55,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 39 [2022-03-18 13:01:55,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532805034] [2022-03-18 13:01:55,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:55,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 13:01:55,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:55,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 13:01:55,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1393, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 13:01:55,597 INFO L87 Difference]: Start difference. First operand 552 states and 633 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:56,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:56,965 INFO L93 Difference]: Finished difference Result 558 states and 638 transitions. [2022-03-18 13:01:56,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 13:01:56,965 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-03-18 13:01:56,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:56,967 INFO L225 Difference]: With dead ends: 558 [2022-03-18 13:01:56,967 INFO L226 Difference]: Without dead ends: 536 [2022-03-18 13:01:56,969 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=243, Invalid=4313, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 13:01:56,969 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 158 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3784 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 3819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:56,969 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 238 Invalid, 3819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3784 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 13:01:56,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-03-18 13:01:57,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2022-03-18 13:01:57,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 476 states have (on average 1.1638655462184875) internal successors, (554), 510 states have internal predecessors, (554), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2022-03-18 13:01:57,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 615 transitions. [2022-03-18 13:01:57,093 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 615 transitions. Word has length 51 [2022-03-18 13:01:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:57,093 INFO L478 AbstractCegarLoop]: Abstraction has 536 states and 615 transitions. [2022-03-18 13:01:57,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:57,094 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 615 transitions. [2022-03-18 13:01:57,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 13:01:57,096 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:57,096 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:57,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:57,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-18 13:01:57,311 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:57,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:57,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1318950550, now seen corresponding path program 53 times [2022-03-18 13:01:57,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:57,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883492692] [2022-03-18 13:01:57,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:57,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:57,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:57,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:57,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-18 13:01:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:01:57,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:57,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883492692] [2022-03-18 13:01:57,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883492692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:57,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654418988] [2022-03-18 13:01:57,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:01:57,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:57,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:57,627 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:57,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-18 13:01:57,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-18 13:01:57,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:57,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 13:01:57,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:01:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:01:57,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:01:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:01:58,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654418988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:01:58,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:01:58,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 39 [2022-03-18 13:01:58,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392032375] [2022-03-18 13:01:58,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:01:58,182 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 13:01:58,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:01:58,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 13:01:58,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 13:01:58,182 INFO L87 Difference]: Start difference. First operand 536 states and 615 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:59,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:01:59,297 INFO L93 Difference]: Finished difference Result 542 states and 620 transitions. [2022-03-18 13:01:59,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 13:01:59,297 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-03-18 13:01:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:01:59,299 INFO L225 Difference]: With dead ends: 542 [2022-03-18 13:01:59,299 INFO L226 Difference]: Without dead ends: 518 [2022-03-18 13:01:59,301 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=245, Invalid=4045, Unknown=0, NotChecked=0, Total=4290 [2022-03-18 13:01:59,301 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 121 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 13:01:59,302 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 200 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 13:01:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-03-18 13:01:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2022-03-18 13:01:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 461 states have (on average 1.1648590021691974) internal successors, (537), 493 states have internal predecessors, (537), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (37), 19 states have call predecessors, (37), 19 states have call successors, (37) [2022-03-18 13:01:59,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 595 transitions. [2022-03-18 13:01:59,417 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 595 transitions. Word has length 51 [2022-03-18 13:01:59,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:01:59,418 INFO L478 AbstractCegarLoop]: Abstraction has 518 states and 595 transitions. [2022-03-18 13:01:59,418 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:01:59,418 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 595 transitions. [2022-03-18 13:01:59,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 13:01:59,420 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:01:59,420 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:01:59,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-18 13:01:59,636 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:59,636 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:01:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:01:59,637 INFO L85 PathProgramCache]: Analyzing trace with hash -774418501, now seen corresponding path program 54 times [2022-03-18 13:01:59,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:01:59,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357752333] [2022-03-18 13:01:59,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:01:59,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:01:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:59,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:01:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:59,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:01:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:59,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 13:01:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:01:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 13:01:59,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:01:59,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357752333] [2022-03-18 13:01:59,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357752333] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:01:59,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550823071] [2022-03-18 13:01:59,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:01:59,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:01:59,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:01:59,916 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:01:59,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-18 13:01:59,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 13:01:59,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:01:59,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 13:01:59,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-18 13:02:00,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-18 13:02:00,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550823071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:00,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:00,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 39 [2022-03-18 13:02:00,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153574173] [2022-03-18 13:02:00,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:00,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 13:02:00,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:00,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 13:02:00,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 13:02:00,621 INFO L87 Difference]: Start difference. First operand 518 states and 595 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:02:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:02:01,841 INFO L93 Difference]: Finished difference Result 590 states and 681 transitions. [2022-03-18 13:02:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 13:02:01,842 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-03-18 13:02:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:02:01,846 INFO L225 Difference]: With dead ends: 590 [2022-03-18 13:02:01,846 INFO L226 Difference]: Without dead ends: 573 [2022-03-18 13:02:01,848 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=325, Invalid=3097, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 13:02:01,848 INFO L912 BasicCegarLoop]: 71 mSDtfsCounter, 496 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 13:02:01,853 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 163 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 13:02:01,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-03-18 13:02:01,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 568. [2022-03-18 13:02:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 490 states have (on average 1.153061224489796) internal successors, (565), 536 states have internal predecessors, (565), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2022-03-18 13:02:01,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 651 transitions. [2022-03-18 13:02:01,976 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 651 transitions. Word has length 51 [2022-03-18 13:02:01,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:02:01,977 INFO L478 AbstractCegarLoop]: Abstraction has 568 states and 651 transitions. [2022-03-18 13:02:01,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:02:01,977 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 651 transitions. [2022-03-18 13:02:01,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 13:02:01,979 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:02:01,979 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:02:02,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-18 13:02:02,196 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:02,196 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:02:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:02:02,196 INFO L85 PathProgramCache]: Analyzing trace with hash -103251766, now seen corresponding path program 55 times [2022-03-18 13:02:02,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:02:02,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957833459] [2022-03-18 13:02:02,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:02:02,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:02:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:02,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:02:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:02,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:02:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:02,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-18 13:02:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:02,586 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:02:02,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:02:02,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957833459] [2022-03-18 13:02:02,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957833459] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:02:02,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493462397] [2022-03-18 13:02:02,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:02:02,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:02,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:02:02,587 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:02:02,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-18 13:02:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:02,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 13:02:02,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:02:03,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:02:03,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493462397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:03,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:03,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 39 [2022-03-18 13:02:03,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664310171] [2022-03-18 13:02:03,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:03,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 13:02:03,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:03,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 13:02:03,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1385, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 13:02:03,309 INFO L87 Difference]: Start difference. First operand 568 states and 651 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:04,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:02:04,359 INFO L93 Difference]: Finished difference Result 586 states and 673 transitions. [2022-03-18 13:02:04,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 13:02:04,359 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-03-18 13:02:04,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:02:04,362 INFO L225 Difference]: With dead ends: 586 [2022-03-18 13:02:04,362 INFO L226 Difference]: Without dead ends: 569 [2022-03-18 13:02:04,364 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=247, Invalid=3785, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 13:02:04,365 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 80 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1918 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 13:02:04,365 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 193 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1918 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 13:02:04,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-03-18 13:02:04,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 564. [2022-03-18 13:02:04,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 486 states have (on average 1.1563786008230452) internal successors, (562), 532 states have internal predecessors, (562), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2022-03-18 13:02:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 648 transitions. [2022-03-18 13:02:04,493 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 648 transitions. Word has length 51 [2022-03-18 13:02:04,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:02:04,493 INFO L478 AbstractCegarLoop]: Abstraction has 564 states and 648 transitions. [2022-03-18 13:02:04,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:04,493 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 648 transitions. [2022-03-18 13:02:04,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 13:02:04,496 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:02:04,496 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:02:04,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-18 13:02:04,700 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:04,701 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:02:04,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:02:04,709 INFO L85 PathProgramCache]: Analyzing trace with hash -2133704513, now seen corresponding path program 56 times [2022-03-18 13:02:04,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:02:04,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313404217] [2022-03-18 13:02:04,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:02:04,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:02:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:04,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:02:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:04,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:02:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:04,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 13:02:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 13:02:04,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:02:04,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313404217] [2022-03-18 13:02:04,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313404217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:02:04,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152373082] [2022-03-18 13:02:04,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:02:04,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:04,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:02:04,920 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:02:04,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-18 13:02:05,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:02:05,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:02:05,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 13:02:05,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-18 13:02:05,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-18 13:02:05,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152373082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:05,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:05,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 39 [2022-03-18 13:02:05,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821369788] [2022-03-18 13:02:05,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:05,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 13:02:05,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:05,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 13:02:05,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 13:02:05,744 INFO L87 Difference]: Start difference. First operand 564 states and 648 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:02:06,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:02:06,922 INFO L93 Difference]: Finished difference Result 578 states and 661 transitions. [2022-03-18 13:02:06,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 13:02:06,922 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-03-18 13:02:06,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:02:06,925 INFO L225 Difference]: With dead ends: 578 [2022-03-18 13:02:06,925 INFO L226 Difference]: Without dead ends: 554 [2022-03-18 13:02:06,927 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=325, Invalid=3097, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 13:02:06,927 INFO L912 BasicCegarLoop]: 67 mSDtfsCounter, 386 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 13:02:06,927 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 174 Invalid, 2017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1976 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 13:02:06,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-03-18 13:02:07,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2022-03-18 13:02:07,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 474 states have (on average 1.1561181434599157) internal successors, (548), 520 states have internal predecessors, (548), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (52), 26 states have call predecessors, (52), 26 states have call successors, (52) [2022-03-18 13:02:07,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 628 transitions. [2022-03-18 13:02:07,083 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 628 transitions. Word has length 51 [2022-03-18 13:02:07,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:02:07,084 INFO L478 AbstractCegarLoop]: Abstraction has 552 states and 628 transitions. [2022-03-18 13:02:07,084 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:02:07,084 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 628 transitions. [2022-03-18 13:02:07,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-18 13:02:07,087 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:02:07,087 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:02:07,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-18 13:02:07,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:07,303 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:02:07,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:02:07,304 INFO L85 PathProgramCache]: Analyzing trace with hash -2068699601, now seen corresponding path program 57 times [2022-03-18 13:02:07,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:02:07,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810866858] [2022-03-18 13:02:07,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:02:07,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:02:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:07,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:02:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:07,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:02:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:07,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-18 13:02:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:02:07,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:02:07,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810866858] [2022-03-18 13:02:07,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810866858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:02:07,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445145562] [2022-03-18 13:02:07,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:02:07,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:07,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:02:07,657 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:02:07,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-18 13:02:07,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-18 13:02:07,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:02:07,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 13:02:07,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:02:08,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:02:08,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445145562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:08,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:08,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 61 [2022-03-18 13:02:08,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511076567] [2022-03-18 13:02:08,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:08,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-18 13:02:08,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:08,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-18 13:02:08,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3459, Unknown=0, NotChecked=0, Total=3660 [2022-03-18 13:02:08,883 INFO L87 Difference]: Start difference. First operand 552 states and 628 transitions. Second operand has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:02:11,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:02:11,562 INFO L93 Difference]: Finished difference Result 642 states and 735 transitions. [2022-03-18 13:02:11,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 13:02:11,562 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-03-18 13:02:11,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:02:11,566 INFO L225 Difference]: With dead ends: 642 [2022-03-18 13:02:11,566 INFO L226 Difference]: Without dead ends: 628 [2022-03-18 13:02:11,585 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=640, Invalid=8672, Unknown=0, NotChecked=0, Total=9312 [2022-03-18 13:02:11,585 INFO L912 BasicCegarLoop]: 104 mSDtfsCounter, 1094 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3995 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 4116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 3995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:02:11,585 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1099 Valid, 246 Invalid, 4116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 3995 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 13:02:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-03-18 13:02:11,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 619. [2022-03-18 13:02:11,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 532 states have (on average 1.1541353383458646) internal successors, (614), 584 states have internal predecessors, (614), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (61), 29 states have call predecessors, (61), 29 states have call successors, (61) [2022-03-18 13:02:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 706 transitions. [2022-03-18 13:02:11,765 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 706 transitions. Word has length 52 [2022-03-18 13:02:11,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:02:11,766 INFO L478 AbstractCegarLoop]: Abstraction has 619 states and 706 transitions. [2022-03-18 13:02:11,766 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:02:11,766 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 706 transitions. [2022-03-18 13:02:11,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-18 13:02:11,769 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:02:11,769 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:02:11,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-18 13:02:11,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-18 13:02:11,979 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:02:11,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:02:11,980 INFO L85 PathProgramCache]: Analyzing trace with hash 333057708, now seen corresponding path program 58 times [2022-03-18 13:02:11,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:02:11,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404837472] [2022-03-18 13:02:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:02:11,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:02:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:11,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:02:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:11,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:02:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:12,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 13:02:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:02:12,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:02:12,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404837472] [2022-03-18 13:02:12,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404837472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:02:12,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7231893] [2022-03-18 13:02:12,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:02:12,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:12,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:02:12,352 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:02:12,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-18 13:02:12,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:02:12,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:02:12,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 13:02:12,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:02:13,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:02:13,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7231893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:13,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:13,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 61 [2022-03-18 13:02:13,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23881038] [2022-03-18 13:02:13,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:13,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-18 13:02:13,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:13,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-18 13:02:13,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3459, Unknown=0, NotChecked=0, Total=3660 [2022-03-18 13:02:13,888 INFO L87 Difference]: Start difference. First operand 619 states and 706 transitions. Second operand has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:02:16,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:02:16,520 INFO L93 Difference]: Finished difference Result 634 states and 721 transitions. [2022-03-18 13:02:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 13:02:16,520 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-03-18 13:02:16,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:02:16,523 INFO L225 Difference]: With dead ends: 634 [2022-03-18 13:02:16,523 INFO L226 Difference]: Without dead ends: 622 [2022-03-18 13:02:16,525 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=640, Invalid=8672, Unknown=0, NotChecked=0, Total=9312 [2022-03-18 13:02:16,525 INFO L912 BasicCegarLoop]: 108 mSDtfsCounter, 1051 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 5096 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1068 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 5201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 5096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 13:02:16,525 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1068 Valid, 280 Invalid, 5201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 5096 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 13:02:16,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-03-18 13:02:16,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 620. [2022-03-18 13:02:16,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 533 states have (on average 1.1538461538461537) internal successors, (615), 585 states have internal predecessors, (615), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2022-03-18 13:02:16,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 703 transitions. [2022-03-18 13:02:16,677 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 703 transitions. Word has length 52 [2022-03-18 13:02:16,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:02:16,677 INFO L478 AbstractCegarLoop]: Abstraction has 620 states and 703 transitions. [2022-03-18 13:02:16,677 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:02:16,677 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 703 transitions. [2022-03-18 13:02:16,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-18 13:02:16,694 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:02:16,694 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:02:16,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-18 13:02:16,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-18 13:02:16,895 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:02:16,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:02:16,895 INFO L85 PathProgramCache]: Analyzing trace with hash -765588306, now seen corresponding path program 59 times [2022-03-18 13:02:16,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:02:16,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499103318] [2022-03-18 13:02:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:02:16,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:02:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:16,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:02:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:16,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:02:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:16,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-18 13:02:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-18 13:02:16,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:02:16,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499103318] [2022-03-18 13:02:16,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499103318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:02:16,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864590233] [2022-03-18 13:02:16,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:02:16,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:16,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:02:16,972 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:02:16,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-18 13:02:17,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-18 13:02:17,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:02:17,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 13:02:17,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-18 13:02:17,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-18 13:02:17,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864590233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:17,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:17,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 19 [2022-03-18 13:02:17,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457794878] [2022-03-18 13:02:17,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:17,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 13:02:17,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:17,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 13:02:17,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-03-18 13:02:17,235 INFO L87 Difference]: Start difference. First operand 620 states and 703 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:17,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:02:17,726 INFO L93 Difference]: Finished difference Result 944 states and 1054 transitions. [2022-03-18 13:02:17,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 13:02:17,726 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-03-18 13:02:17,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:02:17,730 INFO L225 Difference]: With dead ends: 944 [2022-03-18 13:02:17,730 INFO L226 Difference]: Without dead ends: 617 [2022-03-18 13:02:17,732 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=494, Invalid=1066, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 13:02:17,732 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 78 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:02:17,734 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 80 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 13:02:17,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-03-18 13:02:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 609. [2022-03-18 13:02:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 528 states have (on average 1.1477272727272727) internal successors, (606), 576 states have internal predecessors, (606), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2022-03-18 13:02:17,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 686 transitions. [2022-03-18 13:02:17,895 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 686 transitions. Word has length 52 [2022-03-18 13:02:17,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:02:17,896 INFO L478 AbstractCegarLoop]: Abstraction has 609 states and 686 transitions. [2022-03-18 13:02:17,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:17,896 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 686 transitions. [2022-03-18 13:02:17,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-18 13:02:17,899 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:02:17,899 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:02:17,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-18 13:02:18,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-18 13:02:18,115 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:02:18,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:02:18,115 INFO L85 PathProgramCache]: Analyzing trace with hash 295087821, now seen corresponding path program 60 times [2022-03-18 13:02:18,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:02:18,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667583176] [2022-03-18 13:02:18,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:02:18,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:02:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:18,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:02:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:18,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:02:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:18,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 13:02:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-18 13:02:18,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:02:18,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667583176] [2022-03-18 13:02:18,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667583176] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:02:18,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080910219] [2022-03-18 13:02:18,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:02:18,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:18,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:02:18,216 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:02:18,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-18 13:02:18,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 13:02:18,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:02:18,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 13:02:18,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-18 13:02:18,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-18 13:02:18,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080910219] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:18,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:18,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 19 [2022-03-18 13:02:18,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809391009] [2022-03-18 13:02:18,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:18,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 13:02:18,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:18,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 13:02:18,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-03-18 13:02:18,480 INFO L87 Difference]: Start difference. First operand 609 states and 686 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:02:18,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:02:18,944 INFO L93 Difference]: Finished difference Result 651 states and 736 transitions. [2022-03-18 13:02:18,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 13:02:18,945 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-03-18 13:02:18,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:02:18,947 INFO L225 Difference]: With dead ends: 651 [2022-03-18 13:02:18,947 INFO L226 Difference]: Without dead ends: 618 [2022-03-18 13:02:18,950 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=494, Invalid=1066, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 13:02:18,950 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 108 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:02:18,950 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 77 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:02:18,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-03-18 13:02:19,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2022-03-18 13:02:19,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 537 states have (on average 1.1452513966480447) internal successors, (615), 585 states have internal predecessors, (615), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2022-03-18 13:02:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 695 transitions. [2022-03-18 13:02:19,129 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 695 transitions. Word has length 52 [2022-03-18 13:02:19,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:02:19,129 INFO L478 AbstractCegarLoop]: Abstraction has 618 states and 695 transitions. [2022-03-18 13:02:19,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:02:19,129 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 695 transitions. [2022-03-18 13:02:19,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 13:02:19,132 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:02:19,133 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:02:19,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-18 13:02:19,346 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:19,346 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:02:19,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:02:19,347 INFO L85 PathProgramCache]: Analyzing trace with hash 715381933, now seen corresponding path program 61 times [2022-03-18 13:02:19,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:02:19,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436080604] [2022-03-18 13:02:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:02:19,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:02:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:19,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:02:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:19,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:02:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:19,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 13:02:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:02:19,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:02:19,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436080604] [2022-03-18 13:02:19,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436080604] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:02:19,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873729465] [2022-03-18 13:02:19,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:02:19,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:19,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:02:19,864 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:02:19,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-18 13:02:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:19,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 13:02:19,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:20,281 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:02:20,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:02:20,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873729465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:20,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:20,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 41 [2022-03-18 13:02:20,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650616548] [2022-03-18 13:02:20,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:20,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 13:02:20,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:20,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 13:02:20,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1551, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 13:02:20,512 INFO L87 Difference]: Start difference. First operand 618 states and 695 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:23,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:02:23,022 INFO L93 Difference]: Finished difference Result 718 states and 808 transitions. [2022-03-18 13:02:23,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 13:02:23,022 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-03-18 13:02:23,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:02:23,026 INFO L225 Difference]: With dead ends: 718 [2022-03-18 13:02:23,026 INFO L226 Difference]: Without dead ends: 712 [2022-03-18 13:02:23,029 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=253, Invalid=5149, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 13:02:23,029 INFO L912 BasicCegarLoop]: 109 mSDtfsCounter, 241 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 5791 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 5841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 5791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-18 13:02:23,029 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 286 Invalid, 5841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 5791 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-18 13:02:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-03-18 13:02:23,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 634. [2022-03-18 13:02:23,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 550 states have (on average 1.1454545454545455) internal successors, (630), 600 states have internal predecessors, (630), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (54), 28 states have call predecessors, (54), 28 states have call successors, (54) [2022-03-18 13:02:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 714 transitions. [2022-03-18 13:02:23,214 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 714 transitions. Word has length 53 [2022-03-18 13:02:23,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:02:23,214 INFO L478 AbstractCegarLoop]: Abstraction has 634 states and 714 transitions. [2022-03-18 13:02:23,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:23,214 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 714 transitions. [2022-03-18 13:02:23,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 13:02:23,218 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:02:23,218 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:02:23,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-18 13:02:23,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:23,431 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:02:23,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:02:23,431 INFO L85 PathProgramCache]: Analyzing trace with hash -839303187, now seen corresponding path program 62 times [2022-03-18 13:02:23,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:02:23,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141466478] [2022-03-18 13:02:23,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:02:23,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:02:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:23,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:02:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:23,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:02:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:23,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 13:02:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:02:23,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:02:23,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141466478] [2022-03-18 13:02:23,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141466478] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:02:23,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682597803] [2022-03-18 13:02:23,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:02:23,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:23,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:02:23,912 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:02:23,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-18 13:02:23,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:02:23,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:02:23,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-18 13:02:23,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:02:24,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:02:24,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682597803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:24,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:24,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 41 [2022-03-18 13:02:24,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975044545] [2022-03-18 13:02:24,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:24,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 13:02:24,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:24,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 13:02:24,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1547, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 13:02:24,668 INFO L87 Difference]: Start difference. First operand 634 states and 714 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:02:26,527 INFO L93 Difference]: Finished difference Result 640 states and 719 transitions. [2022-03-18 13:02:26,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 13:02:26,528 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-03-18 13:02:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:02:26,530 INFO L225 Difference]: With dead ends: 640 [2022-03-18 13:02:26,530 INFO L226 Difference]: Without dead ends: 618 [2022-03-18 13:02:26,534 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=255, Invalid=4857, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 13:02:26,534 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 174 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4530 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 4565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 4530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:02:26,534 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 256 Invalid, 4565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 4530 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 13:02:26,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-03-18 13:02:26,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2022-03-18 13:02:26,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 537 states have (on average 1.1452513966480447) internal successors, (615), 585 states have internal predecessors, (615), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (52), 27 states have call predecessors, (52), 27 states have call successors, (52) [2022-03-18 13:02:26,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 696 transitions. [2022-03-18 13:02:26,688 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 696 transitions. Word has length 53 [2022-03-18 13:02:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:02:26,689 INFO L478 AbstractCegarLoop]: Abstraction has 618 states and 696 transitions. [2022-03-18 13:02:26,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:26,689 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 696 transitions. [2022-03-18 13:02:26,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 13:02:26,692 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:02:26,692 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:02:26,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-18 13:02:26,908 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:26,908 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:02:26,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:02:26,909 INFO L85 PathProgramCache]: Analyzing trace with hash 886283437, now seen corresponding path program 63 times [2022-03-18 13:02:26,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:02:26,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89796891] [2022-03-18 13:02:26,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:02:26,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:02:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:26,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:02:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:26,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:02:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:27,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 13:02:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:02:27,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:02:27,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89796891] [2022-03-18 13:02:27,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89796891] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:02:27,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987226889] [2022-03-18 13:02:27,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:02:27,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:27,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:02:27,224 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:02:27,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-18 13:02:27,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 13:02:27,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:02:27,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 13:02:27,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:02:27,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:02:27,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987226889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:27,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:27,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 41 [2022-03-18 13:02:27,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727677300] [2022-03-18 13:02:27,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:27,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 13:02:27,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:27,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 13:02:27,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1543, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 13:02:27,749 INFO L87 Difference]: Start difference. First operand 618 states and 696 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:02:28,981 INFO L93 Difference]: Finished difference Result 624 states and 701 transitions. [2022-03-18 13:02:28,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 13:02:28,982 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-03-18 13:02:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:02:28,984 INFO L225 Difference]: With dead ends: 624 [2022-03-18 13:02:28,984 INFO L226 Difference]: Without dead ends: 600 [2022-03-18 13:02:28,987 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 92 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=257, Invalid=4573, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 13:02:28,987 INFO L912 BasicCegarLoop]: 74 mSDtfsCounter, 134 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3940 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 3974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:02:28,987 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 251 Invalid, 3974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 3940 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 13:02:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-03-18 13:02:29,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2022-03-18 13:02:29,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 522 states have (on average 1.1455938697318007) internal successors, (598), 568 states have internal predecessors, (598), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (50), 26 states have call predecessors, (50), 26 states have call successors, (50) [2022-03-18 13:02:29,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 676 transitions. [2022-03-18 13:02:29,136 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 676 transitions. Word has length 53 [2022-03-18 13:02:29,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:02:29,136 INFO L478 AbstractCegarLoop]: Abstraction has 600 states and 676 transitions. [2022-03-18 13:02:29,136 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:29,136 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 676 transitions. [2022-03-18 13:02:29,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 13:02:29,139 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:02:29,139 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:02:29,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-18 13:02:29,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:29,356 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:02:29,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:02:29,356 INFO L85 PathProgramCache]: Analyzing trace with hash -537493523, now seen corresponding path program 64 times [2022-03-18 13:02:29,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:02:29,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865632186] [2022-03-18 13:02:29,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:02:29,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:02:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:29,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:02:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:29,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:02:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:29,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 13:02:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:29,746 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:02:29,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:02:29,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865632186] [2022-03-18 13:02:29,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865632186] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:02:29,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187269625] [2022-03-18 13:02:29,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:02:29,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:29,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:02:29,748 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:02:29,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-18 13:02:29,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:02:29,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:02:29,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 13:02:29,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:02:30,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:02:30,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187269625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:30,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:30,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 41 [2022-03-18 13:02:30,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274184258] [2022-03-18 13:02:30,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:30,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 13:02:30,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:30,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 13:02:30,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1539, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 13:02:30,602 INFO L87 Difference]: Start difference. First operand 600 states and 676 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:31,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:02:31,735 INFO L93 Difference]: Finished difference Result 606 states and 681 transitions. [2022-03-18 13:02:31,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 13:02:31,735 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-03-18 13:02:31,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:02:31,737 INFO L225 Difference]: With dead ends: 606 [2022-03-18 13:02:31,738 INFO L226 Difference]: Without dead ends: 580 [2022-03-18 13:02:31,740 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=259, Invalid=4297, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 13:02:31,745 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 96 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2654 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 2686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 13:02:31,745 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 216 Invalid, 2686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2654 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 13:02:31,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-03-18 13:02:31,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2022-03-18 13:02:31,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 505 states have (on average 1.1465346534653464) internal successors, (579), 549 states have internal predecessors, (579), 27 states have call successors, (27), 5 states have call predecessors, (27), 47 states have return successors, (48), 25 states have call predecessors, (48), 25 states have call successors, (48) [2022-03-18 13:02:31,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 654 transitions. [2022-03-18 13:02:31,901 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 654 transitions. Word has length 53 [2022-03-18 13:02:31,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:02:31,901 INFO L478 AbstractCegarLoop]: Abstraction has 580 states and 654 transitions. [2022-03-18 13:02:31,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:31,901 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 654 transitions. [2022-03-18 13:02:31,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 13:02:31,903 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:02:31,903 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:02:31,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-18 13:02:32,120 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:32,120 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:02:32,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:02:32,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1906924717, now seen corresponding path program 65 times [2022-03-18 13:02:32,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:02:32,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4133621] [2022-03-18 13:02:32,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:02:32,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:02:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:32,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:02:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:32,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:02:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:32,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 13:02:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:02:32,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:02:32,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4133621] [2022-03-18 13:02:32,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4133621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:02:32,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258194925] [2022-03-18 13:02:32,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:02:32,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:32,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:02:32,496 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:02:32,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-18 13:02:32,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-18 13:02:32,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:02:32,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 13:02:32,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:02:33,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:02:33,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258194925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:33,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:33,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 41 [2022-03-18 13:02:33,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438895156] [2022-03-18 13:02:33,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:33,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 13:02:33,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:33,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 13:02:33,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1535, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 13:02:33,211 INFO L87 Difference]: Start difference. First operand 580 states and 654 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:02:33,856 INFO L93 Difference]: Finished difference Result 598 states and 675 transitions. [2022-03-18 13:02:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 13:02:33,856 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-03-18 13:02:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:02:33,859 INFO L225 Difference]: With dead ends: 598 [2022-03-18 13:02:33,859 INFO L226 Difference]: Without dead ends: 592 [2022-03-18 13:02:33,862 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=261, Invalid=4029, Unknown=0, NotChecked=0, Total=4290 [2022-03-18 13:02:33,862 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 13:02:33,862 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 158 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 13:02:33,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-03-18 13:02:34,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 590. [2022-03-18 13:02:34,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 512 states have (on average 1.1484375) internal successors, (588), 558 states have internal predecessors, (588), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (51), 26 states have call predecessors, (51), 26 states have call successors, (51) [2022-03-18 13:02:34,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 667 transitions. [2022-03-18 13:02:34,024 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 667 transitions. Word has length 53 [2022-03-18 13:02:34,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:02:34,024 INFO L478 AbstractCegarLoop]: Abstraction has 590 states and 667 transitions. [2022-03-18 13:02:34,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:34,024 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 667 transitions. [2022-03-18 13:02:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 13:02:34,027 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:02:34,027 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:02:34,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-18 13:02:34,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-18 13:02:34,244 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:02:34,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:02:34,244 INFO L85 PathProgramCache]: Analyzing trace with hash -317468980, now seen corresponding path program 66 times [2022-03-18 13:02:34,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:02:34,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760927654] [2022-03-18 13:02:34,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:02:34,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:02:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:34,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:02:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:34,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:02:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:34,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 13:02:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:02:34,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:02:34,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760927654] [2022-03-18 13:02:34,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760927654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:02:34,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304784598] [2022-03-18 13:02:34,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:02:34,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:34,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:02:34,508 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:02:34,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-18 13:02:34,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-18 13:02:34,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:02:34,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 13:02:34,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:02:35,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:02:36,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304784598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:36,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:36,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 67 [2022-03-18 13:02:36,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023522774] [2022-03-18 13:02:36,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:36,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-18 13:02:36,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:36,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-18 13:02:36,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4200, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 13:02:36,086 INFO L87 Difference]: Start difference. First operand 590 states and 667 transitions. Second operand has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:02:39,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:02:39,915 INFO L93 Difference]: Finished difference Result 682 states and 776 transitions. [2022-03-18 13:02:39,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 13:02:39,915 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-03-18 13:02:39,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:02:39,919 INFO L225 Difference]: With dead ends: 682 [2022-03-18 13:02:39,919 INFO L226 Difference]: Without dead ends: 668 [2022-03-18 13:02:39,922 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=740, Invalid=10602, Unknown=0, NotChecked=0, Total=11342 [2022-03-18 13:02:39,922 INFO L912 BasicCegarLoop]: 114 mSDtfsCounter, 1206 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 6616 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 6760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 6616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:02:39,922 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1211 Valid, 326 Invalid, 6760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 6616 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-18 13:02:39,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-03-18 13:02:40,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 659. [2022-03-18 13:02:40,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 572 states have (on average 1.1468531468531469) internal successors, (656), 624 states have internal predecessors, (656), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (60), 29 states have call predecessors, (60), 29 states have call successors, (60) [2022-03-18 13:02:40,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 747 transitions. [2022-03-18 13:02:40,098 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 747 transitions. Word has length 54 [2022-03-18 13:02:40,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:02:40,098 INFO L478 AbstractCegarLoop]: Abstraction has 659 states and 747 transitions. [2022-03-18 13:02:40,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:02:40,098 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 747 transitions. [2022-03-18 13:02:40,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 13:02:40,102 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:02:40,102 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:02:40,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-18 13:02:40,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-18 13:02:40,315 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:02:40,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:02:40,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1122563567, now seen corresponding path program 67 times [2022-03-18 13:02:40,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:02:40,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171648657] [2022-03-18 13:02:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:02:40,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:02:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:40,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:02:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:40,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:02:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:40,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 13:02:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:40,684 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:02:40,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:02:40,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171648657] [2022-03-18 13:02:40,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171648657] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:02:40,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185170247] [2022-03-18 13:02:40,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:02:40,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:40,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:02:40,686 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:02:40,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-18 13:02:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:40,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 13:02:40,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:02:41,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:02:42,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185170247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:42,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:42,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 67 [2022-03-18 13:02:42,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861276697] [2022-03-18 13:02:42,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:42,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-18 13:02:42,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:42,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-18 13:02:42,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4200, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 13:02:42,416 INFO L87 Difference]: Start difference. First operand 659 states and 747 transitions. Second operand has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:02:46,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:02:46,219 INFO L93 Difference]: Finished difference Result 674 states and 762 transitions. [2022-03-18 13:02:46,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 13:02:46,219 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-03-18 13:02:46,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:02:46,222 INFO L225 Difference]: With dead ends: 674 [2022-03-18 13:02:46,222 INFO L226 Difference]: Without dead ends: 662 [2022-03-18 13:02:46,225 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=740, Invalid=10602, Unknown=0, NotChecked=0, Total=11342 [2022-03-18 13:02:46,225 INFO L912 BasicCegarLoop]: 118 mSDtfsCounter, 1199 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 7192 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 7318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 7192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 13:02:46,225 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1218 Valid, 340 Invalid, 7318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 7192 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 13:02:46,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-03-18 13:02:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 660. [2022-03-18 13:02:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 573 states have (on average 1.1465968586387434) internal successors, (657), 625 states have internal predecessors, (657), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2022-03-18 13:02:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 744 transitions. [2022-03-18 13:02:46,398 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 744 transitions. Word has length 54 [2022-03-18 13:02:46,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:02:46,398 INFO L478 AbstractCegarLoop]: Abstraction has 660 states and 744 transitions. [2022-03-18 13:02:46,399 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:02:46,399 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 744 transitions. [2022-03-18 13:02:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 13:02:46,402 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:02:46,402 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:02:46,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-18 13:02:46,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-18 13:02:46,615 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:02:46,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:02:46,616 INFO L85 PathProgramCache]: Analyzing trace with hash 334260941, now seen corresponding path program 68 times [2022-03-18 13:02:46,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:02:46,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081597120] [2022-03-18 13:02:46,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:02:46,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:02:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:46,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:02:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:46,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:02:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:46,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 13:02:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-18 13:02:46,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:02:46,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081597120] [2022-03-18 13:02:46,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081597120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:02:46,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244572181] [2022-03-18 13:02:46,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:02:46,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:46,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:02:46,700 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:02:46,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-18 13:02:46,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:02:46,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:02:46,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 13:02:46,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-18 13:02:46,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-18 13:02:47,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244572181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:47,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:47,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2022-03-18 13:02:47,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245510889] [2022-03-18 13:02:47,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:47,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 13:02:47,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:47,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 13:02:47,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-03-18 13:02:47,023 INFO L87 Difference]: Start difference. First operand 660 states and 744 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:02:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:02:47,636 INFO L93 Difference]: Finished difference Result 818 states and 933 transitions. [2022-03-18 13:02:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 13:02:47,636 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2022-03-18 13:02:47,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:02:47,639 INFO L225 Difference]: With dead ends: 818 [2022-03-18 13:02:47,639 INFO L226 Difference]: Without dead ends: 772 [2022-03-18 13:02:47,643 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=579, Invalid=1677, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 13:02:47,643 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 129 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:02:47,643 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 80 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:02:47,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-03-18 13:02:47,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 742. [2022-03-18 13:02:47,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 655 states have (on average 1.1450381679389312) internal successors, (750), 707 states have internal predecessors, (750), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2022-03-18 13:02:47,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 837 transitions. [2022-03-18 13:02:47,901 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 837 transitions. Word has length 54 [2022-03-18 13:02:47,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:02:47,902 INFO L478 AbstractCegarLoop]: Abstraction has 742 states and 837 transitions. [2022-03-18 13:02:47,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:02:47,902 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 837 transitions. [2022-03-18 13:02:47,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 13:02:47,906 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:02:47,906 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:02:47,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-18 13:02:48,106 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-18 13:02:48,107 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:02:48,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:02:48,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1144517490, now seen corresponding path program 69 times [2022-03-18 13:02:48,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:02:48,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799971836] [2022-03-18 13:02:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:02:48,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:02:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:48,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:02:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:48,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:02:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:48,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 13:02:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-18 13:02:48,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:02:48,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799971836] [2022-03-18 13:02:48,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799971836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:02:48,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763655161] [2022-03-18 13:02:48,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:02:48,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:48,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:02:48,198 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:02:48,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-18 13:02:48,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 13:02:48,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:02:48,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 13:02:48,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:48,378 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-18 13:02:48,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-18 13:02:48,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763655161] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:48,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:48,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2022-03-18 13:02:48,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742606992] [2022-03-18 13:02:48,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:48,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 13:02:48,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:48,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 13:02:48,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-03-18 13:02:48,445 INFO L87 Difference]: Start difference. First operand 742 states and 837 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:49,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:02:49,038 INFO L93 Difference]: Finished difference Result 1298 states and 1460 transitions. [2022-03-18 13:02:49,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 13:02:49,039 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2022-03-18 13:02:49,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:02:49,046 INFO L225 Difference]: With dead ends: 1298 [2022-03-18 13:02:49,059 INFO L226 Difference]: Without dead ends: 854 [2022-03-18 13:02:49,064 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=579, Invalid=1677, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 13:02:49,065 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 176 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:02:49,065 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 80 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:02:49,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-03-18 13:02:49,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 824. [2022-03-18 13:02:49,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 737 states have (on average 1.1438263229308006) internal successors, (843), 789 states have internal predecessors, (843), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2022-03-18 13:02:49,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 930 transitions. [2022-03-18 13:02:49,313 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 930 transitions. Word has length 54 [2022-03-18 13:02:49,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:02:49,313 INFO L478 AbstractCegarLoop]: Abstraction has 824 states and 930 transitions. [2022-03-18 13:02:49,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:49,313 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 930 transitions. [2022-03-18 13:02:49,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 13:02:49,317 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:02:49,318 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:02:49,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-18 13:02:49,535 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:49,535 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:02:49,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:02:49,535 INFO L85 PathProgramCache]: Analyzing trace with hash -579740214, now seen corresponding path program 70 times [2022-03-18 13:02:49,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:02:49,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031916956] [2022-03-18 13:02:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:02:49,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:02:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:49,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:02:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:49,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:02:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:49,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 13:02:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:02:50,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:02:50,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031916956] [2022-03-18 13:02:50,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031916956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:02:50,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206286648] [2022-03-18 13:02:50,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:02:50,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:50,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:02:50,010 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:02:50,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-18 13:02:50,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:02:50,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:02:50,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 13:02:50,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:50,418 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:02:50,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:02:50,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206286648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:50,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:50,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 43 [2022-03-18 13:02:50,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2375762] [2022-03-18 13:02:50,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:50,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 13:02:50,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:50,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 13:02:50,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1713, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 13:02:50,612 INFO L87 Difference]: Start difference. First operand 824 states and 930 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:53,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:02:53,058 INFO L93 Difference]: Finished difference Result 940 states and 1061 transitions. [2022-03-18 13:02:53,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 13:02:53,058 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-03-18 13:02:53,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:02:53,063 INFO L225 Difference]: With dead ends: 940 [2022-03-18 13:02:53,063 INFO L226 Difference]: Without dead ends: 934 [2022-03-18 13:02:53,067 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=265, Invalid=5741, Unknown=0, NotChecked=0, Total=6006 [2022-03-18 13:02:53,067 INFO L912 BasicCegarLoop]: 121 mSDtfsCounter, 265 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 6233 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 6285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 6233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-18 13:02:53,067 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 293 Invalid, 6285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 6233 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-18 13:02:53,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-03-18 13:02:53,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 840. [2022-03-18 13:02:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 750 states have (on average 1.144) internal successors, (858), 804 states have internal predecessors, (858), 32 states have call successors, (32), 5 states have call predecessors, (32), 57 states have return successors, (59), 30 states have call predecessors, (59), 30 states have call successors, (59) [2022-03-18 13:02:53,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 949 transitions. [2022-03-18 13:02:53,351 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 949 transitions. Word has length 55 [2022-03-18 13:02:53,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:02:53,351 INFO L478 AbstractCegarLoop]: Abstraction has 840 states and 949 transitions. [2022-03-18 13:02:53,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:53,351 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 949 transitions. [2022-03-18 13:02:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 13:02:53,356 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:02:53,356 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:02:53,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-18 13:02:53,573 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:53,573 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:02:53,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:02:53,573 INFO L85 PathProgramCache]: Analyzing trace with hash -2028236118, now seen corresponding path program 71 times [2022-03-18 13:02:53,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:02:53,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921390872] [2022-03-18 13:02:53,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:02:53,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:02:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:53,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:02:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:53,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:02:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:53,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 13:02:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:02:54,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:02:54,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921390872] [2022-03-18 13:02:54,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921390872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:02:54,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912496770] [2022-03-18 13:02:54,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:02:54,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:54,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:02:54,087 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:02:54,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-18 13:02:54,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-18 13:02:54,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:02:54,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 13:02:54,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:02:54,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:02:54,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912496770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:54,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:54,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 43 [2022-03-18 13:02:54,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818537306] [2022-03-18 13:02:54,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:54,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 13:02:54,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:54,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 13:02:54,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1709, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 13:02:54,911 INFO L87 Difference]: Start difference. First operand 840 states and 949 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:57,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:02:57,547 INFO L93 Difference]: Finished difference Result 846 states and 954 transitions. [2022-03-18 13:02:57,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 13:02:57,550 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-03-18 13:02:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:02:57,554 INFO L225 Difference]: With dead ends: 846 [2022-03-18 13:02:57,554 INFO L226 Difference]: Without dead ends: 824 [2022-03-18 13:02:57,557 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=267, Invalid=5433, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 13:02:57,557 INFO L912 BasicCegarLoop]: 101 mSDtfsCounter, 197 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6002 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 6041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 6002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:02:57,558 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 298 Invalid, 6041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 6002 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 13:02:57,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-03-18 13:02:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 824. [2022-03-18 13:02:57,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 737 states have (on average 1.1438263229308006) internal successors, (843), 789 states have internal predecessors, (843), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2022-03-18 13:02:57,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 931 transitions. [2022-03-18 13:02:57,847 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 931 transitions. Word has length 55 [2022-03-18 13:02:57,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:02:57,847 INFO L478 AbstractCegarLoop]: Abstraction has 824 states and 931 transitions. [2022-03-18 13:02:57,847 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:02:57,847 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 931 transitions. [2022-03-18 13:02:57,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 13:02:57,852 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:02:57,852 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:02:57,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-18 13:02:58,065 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:58,065 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:02:58,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:02:58,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1858987446, now seen corresponding path program 72 times [2022-03-18 13:02:58,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:02:58,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819021115] [2022-03-18 13:02:58,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:02:58,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:02:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:58,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:02:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:58,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:02:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:58,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 13:02:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:02:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:02:58,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:02:58,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819021115] [2022-03-18 13:02:58,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819021115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:02:58,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506759455] [2022-03-18 13:02:58,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:02:58,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:02:58,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:02:58,535 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:02:58,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-18 13:02:58,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 13:02:58,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:02:58,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-18 13:02:58,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:02:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:02:59,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:02:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:02:59,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506759455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:02:59,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:02:59,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 43 [2022-03-18 13:02:59,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268271093] [2022-03-18 13:02:59,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:02:59,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 13:02:59,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:02:59,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 13:02:59,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1705, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 13:02:59,279 INFO L87 Difference]: Start difference. First operand 824 states and 931 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:00,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:03:00,640 INFO L93 Difference]: Finished difference Result 830 states and 936 transitions. [2022-03-18 13:03:00,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 13:03:00,641 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-03-18 13:03:00,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:03:00,644 INFO L225 Difference]: With dead ends: 830 [2022-03-18 13:03:00,644 INFO L226 Difference]: Without dead ends: 806 [2022-03-18 13:03:00,647 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 96 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=269, Invalid=5133, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 13:03:00,647 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 159 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3850 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 3888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:03:00,647 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 238 Invalid, 3888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3850 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 13:03:00,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-03-18 13:03:00,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 806. [2022-03-18 13:03:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 722 states have (on average 1.1440443213296398) internal successors, (826), 772 states have internal predecessors, (826), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (55), 28 states have call predecessors, (55), 28 states have call successors, (55) [2022-03-18 13:03:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 911 transitions. [2022-03-18 13:03:00,889 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 911 transitions. Word has length 55 [2022-03-18 13:03:00,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:03:00,889 INFO L478 AbstractCegarLoop]: Abstraction has 806 states and 911 transitions. [2022-03-18 13:03:00,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:00,889 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 911 transitions. [2022-03-18 13:03:00,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 13:03:00,893 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:03:00,893 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:03:00,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-18 13:03:01,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-03-18 13:03:01,110 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:03:01,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:03:01,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2070730282, now seen corresponding path program 73 times [2022-03-18 13:03:01,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:03:01,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863407865] [2022-03-18 13:03:01,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:03:01,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:03:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:01,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:03:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:01,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:03:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:01,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 13:03:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:03:01,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:03:01,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863407865] [2022-03-18 13:03:01,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863407865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:03:01,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724814737] [2022-03-18 13:03:01,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:03:01,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:01,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:03:01,400 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:03:01,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-18 13:03:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:01,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 13:03:01,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:03:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:03:01,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:03:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:03:02,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724814737] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:03:02,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:03:02,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 43 [2022-03-18 13:03:02,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793270765] [2022-03-18 13:03:02,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:03:02,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 13:03:02,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:03:02,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 13:03:02,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1701, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 13:03:02,128 INFO L87 Difference]: Start difference. First operand 806 states and 911 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:03,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:03:03,196 INFO L93 Difference]: Finished difference Result 812 states and 916 transitions. [2022-03-18 13:03:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 13:03:03,196 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-03-18 13:03:03,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:03:03,204 INFO L225 Difference]: With dead ends: 812 [2022-03-18 13:03:03,204 INFO L226 Difference]: Without dead ends: 786 [2022-03-18 13:03:03,208 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=271, Invalid=4841, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 13:03:03,208 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 120 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2702 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 2740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 13:03:03,208 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 205 Invalid, 2740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2702 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 13:03:03,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-03-18 13:03:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 786. [2022-03-18 13:03:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 705 states have (on average 1.1446808510638298) internal successors, (807), 753 states have internal predecessors, (807), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (53), 27 states have call predecessors, (53), 27 states have call successors, (53) [2022-03-18 13:03:03,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 889 transitions. [2022-03-18 13:03:03,461 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 889 transitions. Word has length 55 [2022-03-18 13:03:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:03:03,461 INFO L478 AbstractCegarLoop]: Abstraction has 786 states and 889 transitions. [2022-03-18 13:03:03,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 889 transitions. [2022-03-18 13:03:03,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 13:03:03,465 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:03:03,465 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:03:03,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-18 13:03:03,682 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:03,682 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:03:03,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:03:03,682 INFO L85 PathProgramCache]: Analyzing trace with hash -827352577, now seen corresponding path program 74 times [2022-03-18 13:03:03,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:03:03,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746285752] [2022-03-18 13:03:03,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:03:03,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:03:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:03,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:03:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:03,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:03:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:03,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 13:03:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 13:03:03,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:03:03,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746285752] [2022-03-18 13:03:03,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746285752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:03:03,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492651504] [2022-03-18 13:03:03,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:03:03,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:03,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:03:03,944 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:03:03,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-18 13:03:04,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:03:04,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:03:04,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 13:03:04,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:03:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-18 13:03:04,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:03:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-18 13:03:04,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492651504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:03:04,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:03:04,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 45 [2022-03-18 13:03:04,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390011755] [2022-03-18 13:03:04,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:03:04,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 13:03:04,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:03:04,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 13:03:04,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 13:03:04,838 INFO L87 Difference]: Start difference. First operand 786 states and 889 transitions. Second operand has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:03:06,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:03:06,596 INFO L93 Difference]: Finished difference Result 874 states and 995 transitions. [2022-03-18 13:03:06,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 13:03:06,596 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-03-18 13:03:06,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:03:06,605 INFO L225 Difference]: With dead ends: 874 [2022-03-18 13:03:06,605 INFO L226 Difference]: Without dead ends: 856 [2022-03-18 13:03:06,609 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=404, Invalid=4288, Unknown=0, NotChecked=0, Total=4692 [2022-03-18 13:03:06,609 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 463 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2638 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:03:06,609 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 200 Invalid, 2698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2638 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 13:03:06,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-03-18 13:03:06,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 851. [2022-03-18 13:03:06,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 743 states have (on average 1.135935397039031) internal successors, (844), 809 states have internal predecessors, (844), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2022-03-18 13:03:06,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 962 transitions. [2022-03-18 13:03:06,914 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 962 transitions. Word has length 55 [2022-03-18 13:03:06,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:03:06,914 INFO L478 AbstractCegarLoop]: Abstraction has 851 states and 962 transitions. [2022-03-18 13:03:06,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:03:06,914 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 962 transitions. [2022-03-18 13:03:06,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 13:03:06,920 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:03:06,920 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:03:06,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-18 13:03:07,134 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:07,134 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:03:07,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:03:07,135 INFO L85 PathProgramCache]: Analyzing trace with hash -704555318, now seen corresponding path program 75 times [2022-03-18 13:03:07,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:03:07,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376511011] [2022-03-18 13:03:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:03:07,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:03:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:07,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:03:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:07,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:03:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:07,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 13:03:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:03:07,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:03:07,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376511011] [2022-03-18 13:03:07,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376511011] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:03:07,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996531929] [2022-03-18 13:03:07,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:03:07,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:07,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:03:07,534 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:03:07,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-18 13:03:07,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 13:03:07,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:03:07,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 13:03:07,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:03:08,209 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:03:08,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:03:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:03:08,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996531929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:03:08,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:03:08,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 43 [2022-03-18 13:03:08,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503032421] [2022-03-18 13:03:08,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:03:08,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 13:03:08,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:03:08,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 13:03:08,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1697, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 13:03:08,459 INFO L87 Difference]: Start difference. First operand 851 states and 962 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:09,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:03:09,826 INFO L93 Difference]: Finished difference Result 869 states and 984 transitions. [2022-03-18 13:03:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 13:03:09,826 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-03-18 13:03:09,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:03:09,831 INFO L225 Difference]: With dead ends: 869 [2022-03-18 13:03:09,831 INFO L226 Difference]: Without dead ends: 851 [2022-03-18 13:03:09,835 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 92 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=273, Invalid=4557, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 13:03:09,835 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2201 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 13:03:09,835 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 208 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2201 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 13:03:09,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-03-18 13:03:10,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 846. [2022-03-18 13:03:10,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 738 states have (on average 1.1382113821138211) internal successors, (840), 804 states have internal predecessors, (840), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2022-03-18 13:03:10,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 958 transitions. [2022-03-18 13:03:10,119 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 958 transitions. Word has length 55 [2022-03-18 13:03:10,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:03:10,119 INFO L478 AbstractCegarLoop]: Abstraction has 846 states and 958 transitions. [2022-03-18 13:03:10,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:10,120 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 958 transitions. [2022-03-18 13:03:10,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 13:03:10,126 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:03:10,126 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:03:10,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-18 13:03:10,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-03-18 13:03:10,343 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:03:10,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:03:10,343 INFO L85 PathProgramCache]: Analyzing trace with hash -77183301, now seen corresponding path program 76 times [2022-03-18 13:03:10,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:03:10,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76857675] [2022-03-18 13:03:10,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:03:10,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:03:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:10,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:03:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:10,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:03:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:10,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 13:03:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 13:03:10,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:03:10,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76857675] [2022-03-18 13:03:10,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76857675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:03:10,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171614422] [2022-03-18 13:03:10,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:03:10,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:10,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:03:10,624 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:03:10,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-18 13:03:10,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:03:10,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:03:10,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 13:03:10,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:03:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-18 13:03:11,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:03:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-18 13:03:11,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171614422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:03:11,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:03:11,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 45 [2022-03-18 13:03:11,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465666038] [2022-03-18 13:03:11,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:03:11,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 13:03:11,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:03:11,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 13:03:11,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 13:03:11,510 INFO L87 Difference]: Start difference. First operand 846 states and 958 transitions. Second operand has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:03:13,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:03:13,242 INFO L93 Difference]: Finished difference Result 860 states and 971 transitions. [2022-03-18 13:03:13,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 13:03:13,242 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-03-18 13:03:13,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:03:13,245 INFO L225 Difference]: With dead ends: 860 [2022-03-18 13:03:13,245 INFO L226 Difference]: Without dead ends: 834 [2022-03-18 13:03:13,249 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=404, Invalid=4288, Unknown=0, NotChecked=0, Total=4692 [2022-03-18 13:03:13,250 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 603 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2623 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:03:13,250 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 201 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2623 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 13:03:13,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-03-18 13:03:13,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 832. [2022-03-18 13:03:13,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 724 states have (on average 1.138121546961326) internal successors, (824), 790 states have internal predecessors, (824), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (72), 36 states have call predecessors, (72), 36 states have call successors, (72) [2022-03-18 13:03:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 934 transitions. [2022-03-18 13:03:13,509 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 934 transitions. Word has length 55 [2022-03-18 13:03:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:03:13,509 INFO L478 AbstractCegarLoop]: Abstraction has 832 states and 934 transitions. [2022-03-18 13:03:13,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:03:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 934 transitions. [2022-03-18 13:03:13,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 13:03:13,515 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:03:13,515 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:03:13,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-18 13:03:13,733 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:13,733 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:03:13,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:03:13,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1811549873, now seen corresponding path program 77 times [2022-03-18 13:03:13,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:03:13,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546152377] [2022-03-18 13:03:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:03:13,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:03:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:13,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:03:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:13,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:03:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:13,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 13:03:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:03:14,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:03:14,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546152377] [2022-03-18 13:03:14,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546152377] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:03:14,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248245348] [2022-03-18 13:03:14,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:03:14,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:14,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:03:14,144 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:03:14,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-18 13:03:14,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-18 13:03:14,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:03:14,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 13:03:14,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:03:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:03:14,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:03:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:03:15,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248245348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:03:15,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:03:15,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 73 [2022-03-18 13:03:15,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012141482] [2022-03-18 13:03:15,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:03:15,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-18 13:03:15,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:03:15,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-18 13:03:15,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=5013, Unknown=0, NotChecked=0, Total=5256 [2022-03-18 13:03:15,953 INFO L87 Difference]: Start difference. First operand 832 states and 934 transitions. Second operand has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:03:19,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:03:19,970 INFO L93 Difference]: Finished difference Result 948 states and 1071 transitions. [2022-03-18 13:03:19,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-18 13:03:19,970 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-03-18 13:03:19,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:03:19,977 INFO L225 Difference]: With dead ends: 948 [2022-03-18 13:03:19,977 INFO L226 Difference]: Without dead ends: 934 [2022-03-18 13:03:19,982 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1949 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=846, Invalid=12726, Unknown=0, NotChecked=0, Total=13572 [2022-03-18 13:03:19,982 INFO L912 BasicCegarLoop]: 124 mSDtfsCounter, 1454 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7558 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 7727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 7558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 13:03:19,982 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 336 Invalid, 7727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 7558 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 13:03:19,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-03-18 13:03:20,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 925. [2022-03-18 13:03:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 805 states have (on average 1.1366459627329193) internal successors, (915), 879 states have internal predecessors, (915), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (84), 40 states have call predecessors, (84), 40 states have call successors, (84) [2022-03-18 13:03:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1041 transitions. [2022-03-18 13:03:20,282 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1041 transitions. Word has length 56 [2022-03-18 13:03:20,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:03:20,282 INFO L478 AbstractCegarLoop]: Abstraction has 925 states and 1041 transitions. [2022-03-18 13:03:20,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:03:20,282 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1041 transitions. [2022-03-18 13:03:20,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 13:03:20,288 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:03:20,288 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:03:20,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-18 13:03:20,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:20,504 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:03:20,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:03:20,504 INFO L85 PathProgramCache]: Analyzing trace with hash -120213876, now seen corresponding path program 78 times [2022-03-18 13:03:20,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:03:20,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180164187] [2022-03-18 13:03:20,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:03:20,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:03:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:20,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:03:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:20,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:03:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:20,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 13:03:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:20,786 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:03:20,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:03:20,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180164187] [2022-03-18 13:03:20,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180164187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:03:20,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792264022] [2022-03-18 13:03:20,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:03:20,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:20,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:03:20,788 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:03:20,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-18 13:03:20,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 13:03:20,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:03:20,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 13:03:20,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:03:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:03:21,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:03:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:03:22,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792264022] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:03:22,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:03:22,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 73 [2022-03-18 13:03:22,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603730172] [2022-03-18 13:03:22,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:03:22,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-18 13:03:22,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:03:22,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-18 13:03:22,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=5013, Unknown=0, NotChecked=0, Total=5256 [2022-03-18 13:03:22,880 INFO L87 Difference]: Start difference. First operand 925 states and 1041 transitions. Second operand has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:03:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:03:27,586 INFO L93 Difference]: Finished difference Result 940 states and 1056 transitions. [2022-03-18 13:03:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-18 13:03:27,587 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-03-18 13:03:27,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:03:27,590 INFO L225 Difference]: With dead ends: 940 [2022-03-18 13:03:27,591 INFO L226 Difference]: Without dead ends: 928 [2022-03-18 13:03:27,596 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=846, Invalid=12726, Unknown=0, NotChecked=0, Total=13572 [2022-03-18 13:03:27,596 INFO L912 BasicCegarLoop]: 128 mSDtfsCounter, 1539 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 6750 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 6899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 6750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:03:27,596 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1560 Valid, 315 Invalid, 6899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 6750 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 13:03:27,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-03-18 13:03:27,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 926. [2022-03-18 13:03:27,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 806 states have (on average 1.1364764267990075) internal successors, (916), 880 states have internal predecessors, (916), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (79), 40 states have call predecessors, (79), 40 states have call successors, (79) [2022-03-18 13:03:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1037 transitions. [2022-03-18 13:03:27,917 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1037 transitions. Word has length 56 [2022-03-18 13:03:27,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:03:27,917 INFO L478 AbstractCegarLoop]: Abstraction has 926 states and 1037 transitions. [2022-03-18 13:03:27,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:03:27,917 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1037 transitions. [2022-03-18 13:03:27,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 13:03:27,923 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:03:27,923 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:03:27,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-18 13:03:28,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:28,136 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:03:28,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:03:28,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2099731086, now seen corresponding path program 79 times [2022-03-18 13:03:28,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:03:28,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751926551] [2022-03-18 13:03:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:03:28,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:03:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:28,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:03:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:28,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:03:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:28,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 13:03:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 13:03:28,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:03:28,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751926551] [2022-03-18 13:03:28,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751926551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:03:28,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982072823] [2022-03-18 13:03:28,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:03:28,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:28,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:03:28,226 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:03:28,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-18 13:03:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:28,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 13:03:28,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:03:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 13:03:28,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:03:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 13:03:28,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982072823] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:03:28,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:03:28,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 22 [2022-03-18 13:03:28,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276731715] [2022-03-18 13:03:28,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:03:28,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 13:03:28,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:03:28,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 13:03:28,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-03-18 13:03:28,534 INFO L87 Difference]: Start difference. First operand 926 states and 1037 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:29,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:03:29,160 INFO L93 Difference]: Finished difference Result 1404 states and 1549 transitions. [2022-03-18 13:03:29,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 13:03:29,160 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2022-03-18 13:03:29,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:03:29,168 INFO L225 Difference]: With dead ends: 1404 [2022-03-18 13:03:29,168 INFO L226 Difference]: Without dead ends: 925 [2022-03-18 13:03:29,173 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=764, Invalid=1686, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 13:03:29,173 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 103 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:03:29,173 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 74 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:03:29,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-03-18 13:03:29,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 917. [2022-03-18 13:03:29,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 803 states have (on average 1.13200498132005) internal successors, (909), 873 states have internal predecessors, (909), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (73), 38 states have call predecessors, (73), 38 states have call successors, (73) [2022-03-18 13:03:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1022 transitions. [2022-03-18 13:03:29,512 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1022 transitions. Word has length 56 [2022-03-18 13:03:29,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:03:29,513 INFO L478 AbstractCegarLoop]: Abstraction has 917 states and 1022 transitions. [2022-03-18 13:03:29,513 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:29,513 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1022 transitions. [2022-03-18 13:03:29,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 13:03:29,518 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:03:29,518 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:03:29,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-18 13:03:29,736 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-18 13:03:29,736 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:03:29,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:03:29,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1863657747, now seen corresponding path program 80 times [2022-03-18 13:03:29,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:03:29,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071738419] [2022-03-18 13:03:29,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:03:29,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:03:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:29,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:03:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:29,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:03:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:29,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 13:03:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 13:03:29,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:03:29,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071738419] [2022-03-18 13:03:29,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071738419] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:03:29,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928108560] [2022-03-18 13:03:29,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:03:29,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:29,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:03:29,827 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:03:29,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-18 13:03:29,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:03:29,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:03:29,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 13:03:29,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:03:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 13:03:30,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:03:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 13:03:30,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928108560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:03:30,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:03:30,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 22 [2022-03-18 13:03:30,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606773430] [2022-03-18 13:03:30,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:03:30,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 13:03:30,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:03:30,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 13:03:30,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-03-18 13:03:30,138 INFO L87 Difference]: Start difference. First operand 917 states and 1022 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:03:30,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:03:30,859 INFO L93 Difference]: Finished difference Result 967 states and 1082 transitions. [2022-03-18 13:03:30,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 13:03:30,859 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2022-03-18 13:03:30,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:03:30,863 INFO L225 Difference]: With dead ends: 967 [2022-03-18 13:03:30,863 INFO L226 Difference]: Without dead ends: 928 [2022-03-18 13:03:30,868 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=764, Invalid=1686, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 13:03:30,869 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 127 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:03:30,869 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 74 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:03:30,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-03-18 13:03:31,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-03-18 13:03:31,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 814 states have (on average 1.1302211302211302) internal successors, (920), 884 states have internal predecessors, (920), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (73), 38 states have call predecessors, (73), 38 states have call successors, (73) [2022-03-18 13:03:31,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1033 transitions. [2022-03-18 13:03:31,187 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1033 transitions. Word has length 56 [2022-03-18 13:03:31,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:03:31,187 INFO L478 AbstractCegarLoop]: Abstraction has 928 states and 1033 transitions. [2022-03-18 13:03:31,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:03:31,187 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1033 transitions. [2022-03-18 13:03:31,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 13:03:31,193 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:03:31,193 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:03:31,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-18 13:03:31,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-18 13:03:31,410 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:03:31,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:03:31,410 INFO L85 PathProgramCache]: Analyzing trace with hash -451135283, now seen corresponding path program 81 times [2022-03-18 13:03:31,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:03:31,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358616422] [2022-03-18 13:03:31,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:03:31,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:03:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:31,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:03:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:31,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:03:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:31,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 13:03:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:03:32,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:03:32,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358616422] [2022-03-18 13:03:32,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358616422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:03:32,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619743172] [2022-03-18 13:03:32,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:03:32,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:32,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:03:32,006 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:03:32,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-18 13:03:32,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-18 13:03:32,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:03:32,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 13:03:32,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:03:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:03:32,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:03:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:03:32,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619743172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:03:32,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:03:32,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 45 [2022-03-18 13:03:32,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816505320] [2022-03-18 13:03:32,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:03:32,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 13:03:32,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:03:32,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 13:03:32,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1883, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 13:03:32,600 INFO L87 Difference]: Start difference. First operand 928 states and 1033 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:03:35,346 INFO L93 Difference]: Finished difference Result 1052 states and 1172 transitions. [2022-03-18 13:03:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 13:03:35,346 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-03-18 13:03:35,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:03:35,357 INFO L225 Difference]: With dead ends: 1052 [2022-03-18 13:03:35,357 INFO L226 Difference]: Without dead ends: 1046 [2022-03-18 13:03:35,369 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 108 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=277, Invalid=6365, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 13:03:35,369 INFO L912 BasicCegarLoop]: 129 mSDtfsCounter, 286 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 7498 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 7554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 7498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:03:35,369 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 321 Invalid, 7554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 7498 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 13:03:35,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-03-18 13:03:35,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 944. [2022-03-18 13:03:35,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 827 states have (on average 1.1305925030229746) internal successors, (935), 899 states have internal predecessors, (935), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (76), 39 states have call predecessors, (76), 39 states have call successors, (76) [2022-03-18 13:03:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1052 transitions. [2022-03-18 13:03:35,699 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1052 transitions. Word has length 57 [2022-03-18 13:03:35,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:03:35,699 INFO L478 AbstractCegarLoop]: Abstraction has 944 states and 1052 transitions. [2022-03-18 13:03:35,699 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:35,699 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1052 transitions. [2022-03-18 13:03:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 13:03:35,705 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:03:35,705 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:03:35,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-18 13:03:35,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:35,919 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:03:35,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:03:35,920 INFO L85 PathProgramCache]: Analyzing trace with hash -866207603, now seen corresponding path program 82 times [2022-03-18 13:03:35,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:03:35,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395092953] [2022-03-18 13:03:35,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:03:35,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:03:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:35,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:03:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:35,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:03:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:36,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 13:03:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:03:36,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:03:36,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395092953] [2022-03-18 13:03:36,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395092953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:03:36,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018558008] [2022-03-18 13:03:36,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:03:36,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:36,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:03:36,310 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:03:36,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-18 13:03:36,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:03:36,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:03:36,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 13:03:36,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:03:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:03:36,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:03:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:03:37,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018558008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:03:37,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:03:37,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 45 [2022-03-18 13:03:37,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14823900] [2022-03-18 13:03:37,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:03:37,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 13:03:37,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:03:37,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 13:03:37,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1879, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 13:03:37,045 INFO L87 Difference]: Start difference. First operand 944 states and 1052 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:39,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:03:39,468 INFO L93 Difference]: Finished difference Result 950 states and 1057 transitions. [2022-03-18 13:03:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 13:03:39,468 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-03-18 13:03:39,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:03:39,472 INFO L225 Difference]: With dead ends: 950 [2022-03-18 13:03:39,472 INFO L226 Difference]: Without dead ends: 928 [2022-03-18 13:03:39,477 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=279, Invalid=6041, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 13:03:39,477 INFO L912 BasicCegarLoop]: 114 mSDtfsCounter, 212 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 6597 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 6636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 6597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-18 13:03:39,477 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 306 Invalid, 6636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 6597 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-18 13:03:39,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-03-18 13:03:39,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-03-18 13:03:39,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 814 states have (on average 1.1302211302211302) internal successors, (920), 884 states have internal predecessors, (920), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (74), 38 states have call predecessors, (74), 38 states have call successors, (74) [2022-03-18 13:03:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1034 transitions. [2022-03-18 13:03:39,799 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1034 transitions. Word has length 57 [2022-03-18 13:03:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:03:39,799 INFO L478 AbstractCegarLoop]: Abstraction has 928 states and 1034 transitions. [2022-03-18 13:03:39,799 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:39,799 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1034 transitions. [2022-03-18 13:03:39,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 13:03:39,805 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:03:39,805 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:03:39,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-18 13:03:40,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-03-18 13:03:40,019 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:03:40,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:03:40,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1830582477, now seen corresponding path program 83 times [2022-03-18 13:03:40,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:03:40,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528452353] [2022-03-18 13:03:40,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:03:40,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:03:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:40,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:03:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:40,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:03:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:40,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 13:03:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:03:40,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:03:40,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528452353] [2022-03-18 13:03:40,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528452353] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:03:40,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077231937] [2022-03-18 13:03:40,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:03:40,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:40,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:03:40,529 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:03:40,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-18 13:03:40,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-18 13:03:40,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:03:40,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 13:03:40,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:03:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:03:41,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:03:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:03:41,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077231937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:03:41,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:03:41,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 45 [2022-03-18 13:03:41,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018513642] [2022-03-18 13:03:41,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:03:41,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 13:03:41,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:03:41,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 13:03:41,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1875, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 13:03:41,330 INFO L87 Difference]: Start difference. First operand 928 states and 1034 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:43,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:03:43,051 INFO L93 Difference]: Finished difference Result 934 states and 1039 transitions. [2022-03-18 13:03:43,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 13:03:43,051 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-03-18 13:03:43,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:03:43,055 INFO L225 Difference]: With dead ends: 934 [2022-03-18 13:03:43,055 INFO L226 Difference]: Without dead ends: 910 [2022-03-18 13:03:43,059 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=281, Invalid=5725, Unknown=0, NotChecked=0, Total=6006 [2022-03-18 13:03:43,059 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 174 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 5329 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 5367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 5329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:03:43,059 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 281 Invalid, 5367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 5329 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 13:03:43,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-03-18 13:03:43,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 910. [2022-03-18 13:03:43,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 799 states have (on average 1.130162703379224) internal successors, (903), 867 states have internal predecessors, (903), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (72), 37 states have call predecessors, (72), 37 states have call successors, (72) [2022-03-18 13:03:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1014 transitions. [2022-03-18 13:03:43,353 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1014 transitions. Word has length 57 [2022-03-18 13:03:43,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:03:43,353 INFO L478 AbstractCegarLoop]: Abstraction has 910 states and 1014 transitions. [2022-03-18 13:03:43,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:43,353 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1014 transitions. [2022-03-18 13:03:43,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 13:03:43,359 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:03:43,359 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:03:43,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-18 13:03:43,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:43,563 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:03:43,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:03:43,564 INFO L85 PathProgramCache]: Analyzing trace with hash -381847411, now seen corresponding path program 84 times [2022-03-18 13:03:43,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:03:43,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904643878] [2022-03-18 13:03:43,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:03:43,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:03:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:43,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:03:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:43,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:03:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:43,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 13:03:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:03:44,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:03:44,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904643878] [2022-03-18 13:03:44,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904643878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:03:44,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704620711] [2022-03-18 13:03:44,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:03:44,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:44,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:03:44,002 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:03:44,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-18 13:03:44,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 13:03:44,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:03:44,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-18 13:03:44,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:03:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:03:44,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:03:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:03:44,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704620711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:03:44,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:03:44,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 45 [2022-03-18 13:03:44,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485853492] [2022-03-18 13:03:44,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:03:44,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 13:03:44,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:03:44,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 13:03:44,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1871, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 13:03:44,796 INFO L87 Difference]: Start difference. First operand 910 states and 1014 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:46,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:03:46,247 INFO L93 Difference]: Finished difference Result 916 states and 1019 transitions. [2022-03-18 13:03:46,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 13:03:46,248 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-03-18 13:03:46,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:03:46,251 INFO L225 Difference]: With dead ends: 916 [2022-03-18 13:03:46,251 INFO L226 Difference]: Without dead ends: 890 [2022-03-18 13:03:46,255 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=283, Invalid=5417, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 13:03:46,255 INFO L912 BasicCegarLoop]: 74 mSDtfsCounter, 134 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4012 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 4048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 4012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:03:46,255 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 251 Invalid, 4048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 4012 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 13:03:46,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-03-18 13:03:46,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 890. [2022-03-18 13:03:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 782 states have (on average 1.1304347826086956) internal successors, (884), 848 states have internal predecessors, (884), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (70), 36 states have call predecessors, (70), 36 states have call successors, (70) [2022-03-18 13:03:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 992 transitions. [2022-03-18 13:03:46,541 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 992 transitions. Word has length 57 [2022-03-18 13:03:46,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:03:46,541 INFO L478 AbstractCegarLoop]: Abstraction has 890 states and 992 transitions. [2022-03-18 13:03:46,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 992 transitions. [2022-03-18 13:03:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 13:03:46,564 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:03:46,564 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:03:46,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-18 13:03:46,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:46,779 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:03:46,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:03:46,780 INFO L85 PathProgramCache]: Analyzing trace with hash -799098675, now seen corresponding path program 85 times [2022-03-18 13:03:46,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:03:46,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581257772] [2022-03-18 13:03:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:03:46,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:03:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:46,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:03:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:46,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:03:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:46,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 13:03:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:03:47,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:03:47,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581257772] [2022-03-18 13:03:47,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581257772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:03:47,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507944689] [2022-03-18 13:03:47,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:03:47,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:47,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:03:47,076 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:03:47,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-18 13:03:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:47,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 13:03:47,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:03:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:03:47,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:03:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:03:47,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507944689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:03:47,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:03:47,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 45 [2022-03-18 13:03:47,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420864991] [2022-03-18 13:03:47,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:03:47,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 13:03:47,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:03:47,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 13:03:47,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1867, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 13:03:47,695 INFO L87 Difference]: Start difference. First operand 890 states and 992 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:48,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:03:48,882 INFO L93 Difference]: Finished difference Result 896 states and 997 transitions. [2022-03-18 13:03:48,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 13:03:48,883 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-03-18 13:03:48,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:03:48,886 INFO L225 Difference]: With dead ends: 896 [2022-03-18 13:03:48,886 INFO L226 Difference]: Without dead ends: 868 [2022-03-18 13:03:48,890 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 96 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=285, Invalid=5117, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 13:03:48,890 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 96 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3053 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 3087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 13:03:48,890 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 236 Invalid, 3087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 3053 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 13:03:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-03-18 13:03:49,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 868. [2022-03-18 13:03:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 763 states have (on average 1.1310615989515072) internal successors, (863), 827 states have internal predecessors, (863), 37 states have call successors, (37), 5 states have call predecessors, (37), 67 states have return successors, (68), 35 states have call predecessors, (68), 35 states have call successors, (68) [2022-03-18 13:03:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 968 transitions. [2022-03-18 13:03:49,187 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 968 transitions. Word has length 57 [2022-03-18 13:03:49,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:03:49,188 INFO L478 AbstractCegarLoop]: Abstraction has 868 states and 968 transitions. [2022-03-18 13:03:49,188 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:49,188 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 968 transitions. [2022-03-18 13:03:49,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 13:03:49,193 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:03:49,193 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:03:49,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-18 13:03:49,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:49,403 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:03:49,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:03:49,404 INFO L85 PathProgramCache]: Analyzing trace with hash -589678451, now seen corresponding path program 86 times [2022-03-18 13:03:49,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:03:49,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952099980] [2022-03-18 13:03:49,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:03:49,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:03:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:49,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:03:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:49,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:03:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:49,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 13:03:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:03:49,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:03:49,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952099980] [2022-03-18 13:03:49,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952099980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:03:49,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161666033] [2022-03-18 13:03:49,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:03:49,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:49,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:03:49,770 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:03:49,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-18 13:03:49,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:03:49,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:03:49,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 13:03:49,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:03:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:03:50,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:03:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:03:50,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161666033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:03:50,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:03:50,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 45 [2022-03-18 13:03:50,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764153279] [2022-03-18 13:03:50,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:03:50,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 13:03:50,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:03:50,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 13:03:50,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1863, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 13:03:50,763 INFO L87 Difference]: Start difference. First operand 868 states and 968 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:51,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:03:51,745 INFO L93 Difference]: Finished difference Result 886 states and 989 transitions. [2022-03-18 13:03:51,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 13:03:51,745 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-03-18 13:03:51,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:03:51,750 INFO L225 Difference]: With dead ends: 886 [2022-03-18 13:03:51,750 INFO L226 Difference]: Without dead ends: 880 [2022-03-18 13:03:51,754 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=287, Invalid=4825, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 13:03:51,754 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1526 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:03:51,754 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 168 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1526 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 13:03:51,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-03-18 13:03:52,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 878. [2022-03-18 13:03:52,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 770 states have (on average 1.1324675324675324) internal successors, (872), 836 states have internal predecessors, (872), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (71), 36 states have call predecessors, (71), 36 states have call successors, (71) [2022-03-18 13:03:52,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 981 transitions. [2022-03-18 13:03:52,041 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 981 transitions. Word has length 57 [2022-03-18 13:03:52,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:03:52,041 INFO L478 AbstractCegarLoop]: Abstraction has 878 states and 981 transitions. [2022-03-18 13:03:52,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:03:52,042 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 981 transitions. [2022-03-18 13:03:52,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 13:03:52,047 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:03:52,047 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:03:52,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-18 13:03:52,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:52,264 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:03:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:03:52,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2119764308, now seen corresponding path program 87 times [2022-03-18 13:03:52,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:03:52,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953755379] [2022-03-18 13:03:52,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:03:52,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:03:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:52,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:03:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:52,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:03:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:52,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 13:03:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:03:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:03:52,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:03:52,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953755379] [2022-03-18 13:03:52,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953755379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:03:52,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717297367] [2022-03-18 13:03:52,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:03:52,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:03:52,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:03:52,607 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:03:52,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-18 13:03:52,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-18 13:03:52,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:03:52,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 13:03:52,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:03:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:03:53,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:03:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:03:54,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717297367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:03:54,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:03:54,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 79 [2022-03-18 13:03:54,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147842187] [2022-03-18 13:03:54,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:03:54,759 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-18 13:03:54,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:03:54,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-18 13:03:54,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5898, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 13:03:54,760 INFO L87 Difference]: Start difference. First operand 878 states and 981 transitions. Second operand has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:04:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:04:00,204 INFO L93 Difference]: Finished difference Result 996 states and 1120 transitions. [2022-03-18 13:04:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-18 13:04:00,205 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2022-03-18 13:04:00,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:04:00,214 INFO L225 Difference]: With dead ends: 996 [2022-03-18 13:04:00,214 INFO L226 Difference]: Without dead ends: 982 [2022-03-18 13:04:00,219 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=958, Invalid=15044, Unknown=0, NotChecked=0, Total=16002 [2022-03-18 13:04:00,220 INFO L912 BasicCegarLoop]: 134 mSDtfsCounter, 1785 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 8227 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1790 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 8423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 8227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-18 13:04:00,220 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1790 Valid, 341 Invalid, 8423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 8227 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-18 13:04:00,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-03-18 13:04:00,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 973. [2022-03-18 13:04:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 853 states have (on average 1.1313012895662369) internal successors, (965), 927 states have internal predecessors, (965), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (83), 40 states have call predecessors, (83), 40 states have call successors, (83) [2022-03-18 13:04:00,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1090 transitions. [2022-03-18 13:04:00,586 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1090 transitions. Word has length 58 [2022-03-18 13:04:00,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:04:00,586 INFO L478 AbstractCegarLoop]: Abstraction has 973 states and 1090 transitions. [2022-03-18 13:04:00,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:04:00,586 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1090 transitions. [2022-03-18 13:04:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 13:04:00,592 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:04:00,592 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:04:00,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-18 13:04:00,809 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:04:00,809 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:04:00,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:04:00,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1227955953, now seen corresponding path program 88 times [2022-03-18 13:04:00,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:04:00,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823267264] [2022-03-18 13:04:00,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:04:00,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:04:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:00,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:04:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:00,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:04:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:00,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 13:04:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:04:01,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:04:01,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823267264] [2022-03-18 13:04:01,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823267264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:04:01,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301958405] [2022-03-18 13:04:01,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:04:01,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:04:01,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:04:01,253 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:04:01,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-18 13:04:01,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:04:01,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:04:01,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 13:04:01,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:04:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:04:02,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:04:03,528 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:04:03,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301958405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:04:03,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:04:03,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 79 [2022-03-18 13:04:03,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974369201] [2022-03-18 13:04:03,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:04:03,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-18 13:04:03,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:04:03,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-18 13:04:03,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5898, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 13:04:03,530 INFO L87 Difference]: Start difference. First operand 973 states and 1090 transitions. Second operand has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:04:08,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:04:08,962 INFO L93 Difference]: Finished difference Result 988 states and 1105 transitions. [2022-03-18 13:04:08,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-18 13:04:08,963 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2022-03-18 13:04:08,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:04:08,967 INFO L225 Difference]: With dead ends: 988 [2022-03-18 13:04:08,967 INFO L226 Difference]: Without dead ends: 976 [2022-03-18 13:04:08,973 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2333 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=958, Invalid=15044, Unknown=0, NotChecked=0, Total=16002 [2022-03-18 13:04:08,973 INFO L912 BasicCegarLoop]: 138 mSDtfsCounter, 1786 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 8958 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1809 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 9132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 8958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-18 13:04:08,973 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1809 Valid, 375 Invalid, 9132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 8958 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-18 13:04:08,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-03-18 13:04:09,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 974. [2022-03-18 13:04:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 854 states have (on average 1.1311475409836065) internal successors, (966), 928 states have internal predecessors, (966), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2022-03-18 13:04:09,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1086 transitions. [2022-03-18 13:04:09,342 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1086 transitions. Word has length 58 [2022-03-18 13:04:09,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:04:09,343 INFO L478 AbstractCegarLoop]: Abstraction has 974 states and 1086 transitions. [2022-03-18 13:04:09,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:04:09,343 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1086 transitions. [2022-03-18 13:04:09,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 13:04:09,349 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:04:09,350 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:04:09,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-18 13:04:09,561 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-03-18 13:04:09,561 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:04:09,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:04:09,562 INFO L85 PathProgramCache]: Analyzing trace with hash 248974061, now seen corresponding path program 89 times [2022-03-18 13:04:09,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:04:09,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098643522] [2022-03-18 13:04:09,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:04:09,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:04:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:09,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:04:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:09,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:04:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:09,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 13:04:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 13:04:09,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:04:09,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098643522] [2022-03-18 13:04:09,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098643522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:04:09,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192057952] [2022-03-18 13:04:09,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:04:09,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:04:09,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:04:09,692 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:04:09,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-18 13:04:09,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-18 13:04:09,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:04:09,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 13:04:09,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:04:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 13:04:09,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:04:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 13:04:10,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192057952] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:04:10,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:04:10,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2022-03-18 13:04:10,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353716175] [2022-03-18 13:04:10,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:04:10,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 13:04:10,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:04:10,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 13:04:10,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-03-18 13:04:10,026 INFO L87 Difference]: Start difference. First operand 974 states and 1086 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:04:11,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:04:11,066 INFO L93 Difference]: Finished difference Result 1174 states and 1323 transitions. [2022-03-18 13:04:11,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 13:04:11,066 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 58 [2022-03-18 13:04:11,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:04:11,078 INFO L225 Difference]: With dead ends: 1174 [2022-03-18 13:04:11,079 INFO L226 Difference]: Without dead ends: 1120 [2022-03-18 13:04:11,086 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 13:04:11,087 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 160 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:04:11,087 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 74 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:04:11,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-03-18 13:04:11,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1084. [2022-03-18 13:04:11,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 964 states have (on average 1.129668049792531) internal successors, (1089), 1038 states have internal predecessors, (1089), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2022-03-18 13:04:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1209 transitions. [2022-03-18 13:04:11,525 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1209 transitions. Word has length 58 [2022-03-18 13:04:11,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:04:11,525 INFO L478 AbstractCegarLoop]: Abstraction has 1084 states and 1209 transitions. [2022-03-18 13:04:11,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:04:11,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1209 transitions. [2022-03-18 13:04:11,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 13:04:11,536 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:04:11,536 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:04:11,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-18 13:04:11,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-18 13:04:11,752 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:04:11,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:04:11,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1022687022, now seen corresponding path program 90 times [2022-03-18 13:04:11,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:04:11,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721443723] [2022-03-18 13:04:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:04:11,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:04:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:11,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:04:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:11,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:04:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:11,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 13:04:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 13:04:11,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:04:11,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721443723] [2022-03-18 13:04:11,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721443723] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:04:11,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759754782] [2022-03-18 13:04:11,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:04:11,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:04:11,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:04:11,862 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:04:11,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-18 13:04:11,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 13:04:11,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:04:11,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 13:04:11,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:04:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 13:04:12,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:04:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 13:04:12,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759754782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:04:12,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:04:12,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2022-03-18 13:04:12,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127559898] [2022-03-18 13:04:12,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:04:12,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 13:04:12,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:04:12,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 13:04:12,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-03-18 13:04:12,234 INFO L87 Difference]: Start difference. First operand 1084 states and 1209 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:04:13,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:04:13,320 INFO L93 Difference]: Finished difference Result 1860 states and 2065 transitions. [2022-03-18 13:04:13,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 13:04:13,320 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2022-03-18 13:04:13,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:04:13,336 INFO L225 Difference]: With dead ends: 1860 [2022-03-18 13:04:13,336 INFO L226 Difference]: Without dead ends: 1230 [2022-03-18 13:04:13,344 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 13:04:13,345 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 169 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:04:13,345 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 79 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 13:04:13,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-03-18 13:04:13,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1194. [2022-03-18 13:04:13,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1074 states have (on average 1.1284916201117319) internal successors, (1212), 1148 states have internal predecessors, (1212), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2022-03-18 13:04:13,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1332 transitions. [2022-03-18 13:04:13,862 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1332 transitions. Word has length 58 [2022-03-18 13:04:13,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:04:13,862 INFO L478 AbstractCegarLoop]: Abstraction has 1194 states and 1332 transitions. [2022-03-18 13:04:13,862 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:04:13,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1332 transitions. [2022-03-18 13:04:13,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 13:04:13,871 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:04:13,871 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:04:13,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-18 13:04:14,080 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-18 13:04:14,081 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:04:14,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:04:14,081 INFO L85 PathProgramCache]: Analyzing trace with hash -431401302, now seen corresponding path program 91 times [2022-03-18 13:04:14,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:04:14,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36192844] [2022-03-18 13:04:14,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:04:14,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:04:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:14,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:04:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:14,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:04:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:14,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 13:04:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:04:14,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:04:14,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36192844] [2022-03-18 13:04:14,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36192844] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:04:14,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055215736] [2022-03-18 13:04:14,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:04:14,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:04:14,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:04:14,708 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:04:14,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-18 13:04:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:14,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-18 13:04:14,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:04:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:04:15,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:04:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:04:15,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055215736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:04:15,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:04:15,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 47 [2022-03-18 13:04:15,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182716705] [2022-03-18 13:04:15,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:04:15,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 13:04:15,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:04:15,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 13:04:15,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2061, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 13:04:15,547 INFO L87 Difference]: Start difference. First operand 1194 states and 1332 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:04:18,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:04:18,823 INFO L93 Difference]: Finished difference Result 1336 states and 1491 transitions. [2022-03-18 13:04:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 13:04:18,823 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-03-18 13:04:18,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:04:18,831 INFO L225 Difference]: With dead ends: 1336 [2022-03-18 13:04:18,831 INFO L226 Difference]: Without dead ends: 1330 [2022-03-18 13:04:18,839 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=289, Invalid=7021, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 13:04:18,840 INFO L912 BasicCegarLoop]: 141 mSDtfsCounter, 310 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 8181 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 8239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 8181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:04:18,840 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 333 Invalid, 8239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 8181 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-18 13:04:18,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2022-03-18 13:04:19,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1210. [2022-03-18 13:04:19,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1087 states have (on average 1.1287948482060717) internal successors, (1227), 1163 states have internal predecessors, (1227), 43 states have call successors, (43), 5 states have call predecessors, (43), 79 states have return successors, (81), 41 states have call predecessors, (81), 41 states have call successors, (81) [2022-03-18 13:04:19,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1351 transitions. [2022-03-18 13:04:19,450 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1351 transitions. Word has length 59 [2022-03-18 13:04:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:04:19,450 INFO L478 AbstractCegarLoop]: Abstraction has 1210 states and 1351 transitions. [2022-03-18 13:04:19,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:04:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1351 transitions. [2022-03-18 13:04:19,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 13:04:19,460 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:04:19,460 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:04:19,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-18 13:04:19,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-18 13:04:19,675 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:04:19,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:04:19,676 INFO L85 PathProgramCache]: Analyzing trace with hash -279498742, now seen corresponding path program 92 times [2022-03-18 13:04:19,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:04:19,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439583290] [2022-03-18 13:04:19,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:04:19,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:04:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:19,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:04:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:19,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:04:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:19,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 13:04:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:04:20,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:04:20,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439583290] [2022-03-18 13:04:20,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439583290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:04:20,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624120038] [2022-03-18 13:04:20,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:04:20,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:04:20,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:04:20,115 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:04:20,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-18 13:04:20,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:04:20,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:04:20,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 13:04:20,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:04:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:04:20,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:04:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:04:20,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624120038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:04:20,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:04:20,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 47 [2022-03-18 13:04:20,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125096546] [2022-03-18 13:04:20,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:04:20,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 13:04:20,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:04:20,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 13:04:20,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2057, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 13:04:20,974 INFO L87 Difference]: Start difference. First operand 1210 states and 1351 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:04:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:04:24,285 INFO L93 Difference]: Finished difference Result 1216 states and 1356 transitions. [2022-03-18 13:04:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 13:04:24,285 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-03-18 13:04:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:04:24,290 INFO L225 Difference]: With dead ends: 1216 [2022-03-18 13:04:24,290 INFO L226 Difference]: Without dead ends: 1194 [2022-03-18 13:04:24,297 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=291, Invalid=6681, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 13:04:24,297 INFO L912 BasicCegarLoop]: 121 mSDtfsCounter, 237 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 7424 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 7467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 7424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:04:24,297 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 323 Invalid, 7467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 7424 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-18 13:04:24,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-03-18 13:04:24,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1194. [2022-03-18 13:04:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1074 states have (on average 1.1284916201117319) internal successors, (1212), 1148 states have internal predecessors, (1212), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (79), 40 states have call predecessors, (79), 40 states have call successors, (79) [2022-03-18 13:04:24,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1333 transitions. [2022-03-18 13:04:24,799 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1333 transitions. Word has length 59 [2022-03-18 13:04:24,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:04:24,799 INFO L478 AbstractCegarLoop]: Abstraction has 1194 states and 1333 transitions. [2022-03-18 13:04:24,799 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:04:24,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1333 transitions. [2022-03-18 13:04:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 13:04:24,810 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:04:24,810 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:04:24,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-18 13:04:25,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:04:25,028 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:04:25,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:04:25,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2125532374, now seen corresponding path program 93 times [2022-03-18 13:04:25,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:04:25,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584922243] [2022-03-18 13:04:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:04:25,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:04:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:25,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:04:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:25,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:04:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:25,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 13:04:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:04:25,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:04:25,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584922243] [2022-03-18 13:04:25,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584922243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:04:25,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392438309] [2022-03-18 13:04:25,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:04:25,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:04:25,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:04:25,630 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:04:25,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-18 13:04:25,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-18 13:04:25,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:04:25,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 13:04:25,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:04:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:04:26,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:04:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:04:26,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392438309] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:04:26,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:04:26,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 47 [2022-03-18 13:04:26,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801971850] [2022-03-18 13:04:26,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:04:26,569 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 13:04:26,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:04:26,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 13:04:26,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2053, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 13:04:26,569 INFO L87 Difference]: Start difference. First operand 1194 states and 1333 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:04:28,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:04:28,918 INFO L93 Difference]: Finished difference Result 1200 states and 1338 transitions. [2022-03-18 13:04:28,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 13:04:28,918 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-03-18 13:04:28,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:04:28,946 INFO L225 Difference]: With dead ends: 1200 [2022-03-18 13:04:28,946 INFO L226 Difference]: Without dead ends: 1176 [2022-03-18 13:04:28,953 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=293, Invalid=6349, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 13:04:28,953 INFO L912 BasicCegarLoop]: 101 mSDtfsCounter, 197 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6072 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 6114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 6072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 13:04:28,953 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 298 Invalid, 6114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 6072 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 13:04:28,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-03-18 13:04:29,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1176. [2022-03-18 13:04:29,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1059 states have (on average 1.1284230406043436) internal successors, (1195), 1131 states have internal predecessors, (1195), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (77), 39 states have call predecessors, (77), 39 states have call successors, (77) [2022-03-18 13:04:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1313 transitions. [2022-03-18 13:04:29,499 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1313 transitions. Word has length 59 [2022-03-18 13:04:29,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:04:29,499 INFO L478 AbstractCegarLoop]: Abstraction has 1176 states and 1313 transitions. [2022-03-18 13:04:29,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:04:29,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1313 transitions. [2022-03-18 13:04:29,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 13:04:29,507 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:04:29,507 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:04:29,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-18 13:04:29,724 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-18 13:04:29,725 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:04:29,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:04:29,725 INFO L85 PathProgramCache]: Analyzing trace with hash 565515146, now seen corresponding path program 94 times [2022-03-18 13:04:29,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:04:29,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504991366] [2022-03-18 13:04:29,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:04:29,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:04:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:29,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:04:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:29,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:04:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:29,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 13:04:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:04:30,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:04:30,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504991366] [2022-03-18 13:04:30,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504991366] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:04:30,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668688316] [2022-03-18 13:04:30,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:04:30,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:04:30,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:04:30,188 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:04:30,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-18 13:04:30,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:04:30,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:04:30,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 13:04:30,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:04:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:04:30,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:04:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:04:30,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668688316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:04:30,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:04:30,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 47 [2022-03-18 13:04:30,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773065263] [2022-03-18 13:04:30,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:04:30,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 13:04:30,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:04:30,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 13:04:30,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 13:04:30,913 INFO L87 Difference]: Start difference. First operand 1176 states and 1313 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:04:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:04:33,216 INFO L93 Difference]: Finished difference Result 1182 states and 1318 transitions. [2022-03-18 13:04:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 13:04:33,217 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-03-18 13:04:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:04:33,221 INFO L225 Difference]: With dead ends: 1182 [2022-03-18 13:04:33,221 INFO L226 Difference]: Without dead ends: 1156 [2022-03-18 13:04:33,228 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=295, Invalid=6025, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 13:04:33,228 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 158 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4797 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 4837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 13:04:33,228 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 273 Invalid, 4837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4797 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 13:04:33,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-03-18 13:04:33,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1156. [2022-03-18 13:04:33,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1042 states have (on average 1.128598848368522) internal successors, (1176), 1112 states have internal predecessors, (1176), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (75), 38 states have call predecessors, (75), 38 states have call successors, (75) [2022-03-18 13:04:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1291 transitions. [2022-03-18 13:04:33,761 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1291 transitions. Word has length 59 [2022-03-18 13:04:33,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:04:33,761 INFO L478 AbstractCegarLoop]: Abstraction has 1156 states and 1291 transitions. [2022-03-18 13:04:33,762 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:04:33,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1291 transitions. [2022-03-18 13:04:33,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 13:04:33,769 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:04:33,769 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:04:33,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-18 13:04:33,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-18 13:04:33,971 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:04:33,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:04:33,972 INFO L85 PathProgramCache]: Analyzing trace with hash -532705366, now seen corresponding path program 95 times [2022-03-18 13:04:33,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:04:33,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84891347] [2022-03-18 13:04:33,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:04:33,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:04:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:34,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:04:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:34,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:04:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:34,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 13:04:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:04:34,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:04:34,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84891347] [2022-03-18 13:04:34,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84891347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:04:34,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418569196] [2022-03-18 13:04:34,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:04:34,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:04:34,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:04:34,471 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:04:34,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-18 13:04:34,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-18 13:04:34,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:04:34,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-18 13:04:34,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:04:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:04:35,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:04:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:04:35,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418569196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:04:35,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:04:35,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 47 [2022-03-18 13:04:35,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623822862] [2022-03-18 13:04:35,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:04:35,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 13:04:35,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:04:35,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 13:04:35,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2045, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 13:04:35,450 INFO L87 Difference]: Start difference. First operand 1156 states and 1291 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:04:37,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:04:37,531 INFO L93 Difference]: Finished difference Result 1162 states and 1296 transitions. [2022-03-18 13:04:37,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 13:04:37,532 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-03-18 13:04:37,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:04:37,538 INFO L225 Difference]: With dead ends: 1162 [2022-03-18 13:04:37,538 INFO L226 Difference]: Without dead ends: 1134 [2022-03-18 13:04:37,546 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=297, Invalid=5709, Unknown=0, NotChecked=0, Total=6006 [2022-03-18 13:04:37,546 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 121 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 3750 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 3790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:04:37,546 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 260 Invalid, 3790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3750 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 13:04:37,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-03-18 13:04:38,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1134. [2022-03-18 13:04:38,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1023 states have (on average 1.1290322580645162) internal successors, (1155), 1091 states have internal predecessors, (1155), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (73), 37 states have call predecessors, (73), 37 states have call successors, (73) [2022-03-18 13:04:38,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1267 transitions. [2022-03-18 13:04:38,049 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1267 transitions. Word has length 59 [2022-03-18 13:04:38,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:04:38,049 INFO L478 AbstractCegarLoop]: Abstraction has 1134 states and 1267 transitions. [2022-03-18 13:04:38,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:04:38,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1267 transitions. [2022-03-18 13:04:38,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 13:04:38,057 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:04:38,057 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:04:38,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-18 13:04:38,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-03-18 13:04:38,267 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:04:38,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:04:38,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1671481989, now seen corresponding path program 96 times [2022-03-18 13:04:38,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:04:38,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392598640] [2022-03-18 13:04:38,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:04:38,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:04:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:38,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:04:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:38,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:04:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:38,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 13:04:38,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-03-18 13:04:38,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:04:38,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392598640] [2022-03-18 13:04:38,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392598640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:04:38,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251695490] [2022-03-18 13:04:38,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:04:38,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:04:38,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:04:38,587 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:04:38,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-18 13:04:38,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 13:04:38,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:04:38,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 13:04:38,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:04:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-18 13:04:39,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:04:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-18 13:04:39,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251695490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:04:39,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:04:39,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 51 [2022-03-18 13:04:39,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834739387] [2022-03-18 13:04:39,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:04:39,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 13:04:39,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:04:39,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 13:04:39,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2370, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 13:04:39,838 INFO L87 Difference]: Start difference. First operand 1134 states and 1267 transitions. Second operand has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:04:42,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:04:42,338 INFO L93 Difference]: Finished difference Result 1238 states and 1393 transitions. [2022-03-18 13:04:42,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 13:04:42,338 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-03-18 13:04:42,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:04:42,355 INFO L225 Difference]: With dead ends: 1238 [2022-03-18 13:04:42,355 INFO L226 Difference]: Without dead ends: 1219 [2022-03-18 13:04:42,363 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=489, Invalid=5673, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 13:04:42,363 INFO L912 BasicCegarLoop]: 95 mSDtfsCounter, 771 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 3379 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 3461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:04:42,363 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 212 Invalid, 3461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3379 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 13:04:42,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-03-18 13:04:42,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1214. [2022-03-18 13:04:42,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1070 states have (on average 1.122429906542056) internal successors, (1201), 1160 states have internal predecessors, (1201), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (106), 48 states have call predecessors, (106), 48 states have call successors, (106) [2022-03-18 13:04:42,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1357 transitions. [2022-03-18 13:04:42,951 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1357 transitions. Word has length 59 [2022-03-18 13:04:42,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:04:42,951 INFO L478 AbstractCegarLoop]: Abstraction has 1214 states and 1357 transitions. [2022-03-18 13:04:42,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:04:42,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1357 transitions. [2022-03-18 13:04:42,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 13:04:42,960 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:04:42,960 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:04:42,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-18 13:04:43,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-03-18 13:04:43,175 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:04:43,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:04:43,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1489237770, now seen corresponding path program 97 times [2022-03-18 13:04:43,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:04:43,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296779634] [2022-03-18 13:04:43,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:04:43,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:04:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:43,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:04:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:43,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:04:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:43,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 13:04:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:04:43,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:04:43,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296779634] [2022-03-18 13:04:43,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296779634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:04:43,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264213419] [2022-03-18 13:04:43,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:04:43,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:04:43,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:04:43,631 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:04:43,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-18 13:04:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:43,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 13:04:43,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:04:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:04:44,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:04:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:04:44,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264213419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:04:44,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:04:44,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 47 [2022-03-18 13:04:44,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775350403] [2022-03-18 13:04:44,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:04:44,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 13:04:44,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:04:44,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 13:04:44,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2041, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 13:04:44,705 INFO L87 Difference]: Start difference. First operand 1214 states and 1357 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:04:46,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:04:46,369 INFO L93 Difference]: Finished difference Result 1232 states and 1379 transitions. [2022-03-18 13:04:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 13:04:46,369 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-03-18 13:04:46,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:04:46,376 INFO L225 Difference]: With dead ends: 1232 [2022-03-18 13:04:46,377 INFO L226 Difference]: Without dead ends: 1213 [2022-03-18 13:04:46,384 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=299, Invalid=5401, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 13:04:46,385 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 80 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 13:04:46,385 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 203 Invalid, 2240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2202 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 13:04:46,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-03-18 13:04:46,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1208. [2022-03-18 13:04:46,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1064 states have (on average 1.1240601503759398) internal successors, (1196), 1154 states have internal predecessors, (1196), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (106), 48 states have call predecessors, (106), 48 states have call successors, (106) [2022-03-18 13:04:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1352 transitions. [2022-03-18 13:04:46,894 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1352 transitions. Word has length 59 [2022-03-18 13:04:46,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:04:46,894 INFO L478 AbstractCegarLoop]: Abstraction has 1208 states and 1352 transitions. [2022-03-18 13:04:46,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:04:46,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1352 transitions. [2022-03-18 13:04:46,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 13:04:46,903 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:04:46,903 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:04:46,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-18 13:04:47,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:04:47,119 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:04:47,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:04:47,120 INFO L85 PathProgramCache]: Analyzing trace with hash 930505855, now seen corresponding path program 98 times [2022-03-18 13:04:47,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:04:47,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178032229] [2022-03-18 13:04:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:04:47,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:04:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:47,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:04:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:47,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:04:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:47,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 13:04:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-03-18 13:04:47,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:04:47,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178032229] [2022-03-18 13:04:47,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178032229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:04:47,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267473547] [2022-03-18 13:04:47,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:04:47,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:04:47,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:04:47,461 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:04:47,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-18 13:04:47,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:04:47,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:04:47,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 13:04:47,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:04:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-18 13:04:48,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:04:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-18 13:04:48,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267473547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:04:48,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:04:48,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 51 [2022-03-18 13:04:48,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129130405] [2022-03-18 13:04:48,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:04:48,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 13:04:48,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:04:48,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 13:04:48,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2370, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 13:04:48,718 INFO L87 Difference]: Start difference. First operand 1208 states and 1352 transitions. Second operand has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:04:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:04:51,662 INFO L93 Difference]: Finished difference Result 1222 states and 1365 transitions. [2022-03-18 13:04:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 13:04:51,662 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-03-18 13:04:51,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:04:51,667 INFO L225 Difference]: With dead ends: 1222 [2022-03-18 13:04:51,667 INFO L226 Difference]: Without dead ends: 1194 [2022-03-18 13:04:51,676 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 88 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=489, Invalid=5673, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 13:04:51,676 INFO L912 BasicCegarLoop]: 91 mSDtfsCounter, 820 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3642 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 3716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 3642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 13:04:51,676 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [833 Valid, 233 Invalid, 3716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 3642 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 13:04:51,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-03-18 13:04:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1192. [2022-03-18 13:04:52,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1048 states have (on average 1.1240458015267176) internal successors, (1178), 1138 states have internal predecessors, (1178), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (96), 48 states have call predecessors, (96), 48 states have call successors, (96) [2022-03-18 13:04:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1324 transitions. [2022-03-18 13:04:52,221 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1324 transitions. Word has length 59 [2022-03-18 13:04:52,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:04:52,221 INFO L478 AbstractCegarLoop]: Abstraction has 1192 states and 1324 transitions. [2022-03-18 13:04:52,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:04:52,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1324 transitions. [2022-03-18 13:04:52,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 13:04:52,232 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:04:52,232 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:04:52,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-18 13:04:52,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-18 13:04:52,447 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:04:52,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:04:52,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1508010897, now seen corresponding path program 99 times [2022-03-18 13:04:52,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:04:52,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519022658] [2022-03-18 13:04:52,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:04:52,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:04:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:52,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:04:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:52,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:04:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:52,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 13:04:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:04:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:04:53,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:04:53,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519022658] [2022-03-18 13:04:53,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519022658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:04:53,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537958617] [2022-03-18 13:04:53,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:04:53,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:04:53,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:04:53,065 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:04:53,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-18 13:04:53,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-18 13:04:53,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:04:53,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 13:04:53,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:04:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:04:54,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:04:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:04:55,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537958617] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:04:55,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:04:55,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 85 [2022-03-18 13:04:55,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412489675] [2022-03-18 13:04:55,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:04:55,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-18 13:04:55,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:04:55,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-18 13:04:55,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=6855, Unknown=0, NotChecked=0, Total=7140 [2022-03-18 13:04:55,919 INFO L87 Difference]: Start difference. First operand 1192 states and 1324 transitions. Second operand has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:05:03,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:05:03,005 INFO L93 Difference]: Finished difference Result 1336 states and 1493 transitions. [2022-03-18 13:05:03,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-18 13:05:03,005 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2022-03-18 13:05:03,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:05:03,022 INFO L225 Difference]: With dead ends: 1336 [2022-03-18 13:05:03,022 INFO L226 Difference]: Without dead ends: 1322 [2022-03-18 13:05:03,033 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2719 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1076, Invalid=17556, Unknown=0, NotChecked=0, Total=18632 [2022-03-18 13:05:03,033 INFO L912 BasicCegarLoop]: 144 mSDtfsCounter, 2065 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 9689 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2070 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 9914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 9689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:05:03,033 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2070 Valid, 376 Invalid, 9914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 9689 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-18 13:05:03,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-03-18 13:05:03,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1313. [2022-03-18 13:05:03,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1154 states have (on average 1.123050259965338) internal successors, (1296), 1254 states have internal predecessors, (1296), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (111), 53 states have call predecessors, (111), 53 states have call successors, (111) [2022-03-18 13:05:03,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 1462 transitions. [2022-03-18 13:05:03,623 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 1462 transitions. Word has length 60 [2022-03-18 13:05:03,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:05:03,623 INFO L478 AbstractCegarLoop]: Abstraction has 1313 states and 1462 transitions. [2022-03-18 13:05:03,623 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:05:03,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 1462 transitions. [2022-03-18 13:05:03,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 13:05:03,634 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:05:03,634 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:05:03,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-18 13:05:03,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:05:03,835 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:05:03,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:05:03,836 INFO L85 PathProgramCache]: Analyzing trace with hash 368244332, now seen corresponding path program 100 times [2022-03-18 13:05:03,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:05:03,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847672648] [2022-03-18 13:05:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:05:03,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:05:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:03,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:05:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:03,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:05:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:03,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 13:05:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:05:04,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:05:04,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847672648] [2022-03-18 13:05:04,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847672648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:05:04,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667711021] [2022-03-18 13:05:04,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:05:04,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:05:04,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:05:04,220 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:05:04,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-18 13:05:04,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:05:04,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:05:04,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 13:05:04,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:05:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:05:05,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:05:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:05:06,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667711021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:05:06,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:05:06,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 85 [2022-03-18 13:05:06,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634405773] [2022-03-18 13:05:06,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:05:06,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-18 13:05:06,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:05:06,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-18 13:05:06,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=6855, Unknown=0, NotChecked=0, Total=7140 [2022-03-18 13:05:06,347 INFO L87 Difference]: Start difference. First operand 1313 states and 1462 transitions. Second operand has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:05:12,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:05:12,600 INFO L93 Difference]: Finished difference Result 1328 states and 1477 transitions. [2022-03-18 13:05:12,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-18 13:05:12,600 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2022-03-18 13:05:12,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:05:12,607 INFO L225 Difference]: With dead ends: 1328 [2022-03-18 13:05:12,607 INFO L226 Difference]: Without dead ends: 1316 [2022-03-18 13:05:12,617 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2735 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1076, Invalid=17556, Unknown=0, NotChecked=0, Total=18632 [2022-03-18 13:05:12,617 INFO L912 BasicCegarLoop]: 148 mSDtfsCounter, 2105 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 9489 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2130 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 9690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 9489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:05:12,617 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2130 Valid, 375 Invalid, 9690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 9489 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-18 13:05:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2022-03-18 13:05:13,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1314. [2022-03-18 13:05:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1155 states have (on average 1.122943722943723) internal successors, (1297), 1255 states have internal predecessors, (1297), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (105), 53 states have call predecessors, (105), 53 states have call successors, (105) [2022-03-18 13:05:13,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1457 transitions. [2022-03-18 13:05:13,237 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1457 transitions. Word has length 60 [2022-03-18 13:05:13,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:05:13,237 INFO L478 AbstractCegarLoop]: Abstraction has 1314 states and 1457 transitions. [2022-03-18 13:05:13,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:05:13,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1457 transitions. [2022-03-18 13:05:13,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 13:05:13,249 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:05:13,249 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:05:13,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-18 13:05:13,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:05:13,455 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:05:13,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:05:13,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1252044946, now seen corresponding path program 101 times [2022-03-18 13:05:13,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:05:13,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103222916] [2022-03-18 13:05:13,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:05:13,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:05:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:13,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:05:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:13,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:05:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:13,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 13:05:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-18 13:05:13,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:05:13,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103222916] [2022-03-18 13:05:13,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103222916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:05:13,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614779376] [2022-03-18 13:05:13,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:05:13,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:05:13,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:05:13,604 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:05:13,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-18 13:05:13,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-18 13:05:13,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:05:13,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 13:05:13,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:05:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-18 13:05:13,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:05:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-18 13:05:13,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614779376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:05:13,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:05:13,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 25 [2022-03-18 13:05:13,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357625739] [2022-03-18 13:05:13,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:05:13,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 13:05:13,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:05:13,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 13:05:13,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2022-03-18 13:05:13,928 INFO L87 Difference]: Start difference. First operand 1314 states and 1457 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:05:15,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:05:15,099 INFO L93 Difference]: Finished difference Result 1985 states and 2169 transitions. [2022-03-18 13:05:15,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 13:05:15,099 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2022-03-18 13:05:15,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:05:15,119 INFO L225 Difference]: With dead ends: 1985 [2022-03-18 13:05:15,119 INFO L226 Difference]: Without dead ends: 1315 [2022-03-18 13:05:15,166 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1129, Invalid=2531, Unknown=0, NotChecked=0, Total=3660 [2022-03-18 13:05:15,166 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 99 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:05:15,166 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 103 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 13:05:15,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-03-18 13:05:15,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1307. [2022-03-18 13:05:15,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1154 states have (on average 1.1195840554592722) internal successors, (1292), 1250 states have internal predecessors, (1292), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (99), 51 states have call predecessors, (99), 51 states have call successors, (99) [2022-03-18 13:05:15,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1444 transitions. [2022-03-18 13:05:15,793 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1444 transitions. Word has length 60 [2022-03-18 13:05:15,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:05:15,793 INFO L478 AbstractCegarLoop]: Abstraction has 1307 states and 1444 transitions. [2022-03-18 13:05:15,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:05:15,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1444 transitions. [2022-03-18 13:05:15,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 13:05:15,811 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:05:15,811 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:05:15,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-18 13:05:16,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:05:16,027 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:05:16,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:05:16,028 INFO L85 PathProgramCache]: Analyzing trace with hash 476370573, now seen corresponding path program 102 times [2022-03-18 13:05:16,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:05:16,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287545535] [2022-03-18 13:05:16,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:05:16,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:05:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:16,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:05:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:16,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:05:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:16,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 13:05:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-18 13:05:16,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:05:16,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287545535] [2022-03-18 13:05:16,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287545535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:05:16,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795238007] [2022-03-18 13:05:16,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:05:16,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:05:16,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:05:16,160 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:05:16,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-18 13:05:16,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 13:05:16,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:05:16,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 13:05:16,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:05:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-18 13:05:16,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:05:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-18 13:05:16,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795238007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:05:16,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:05:16,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 25 [2022-03-18 13:05:16,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502063822] [2022-03-18 13:05:16,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:05:16,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 13:05:16,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:05:16,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 13:05:16,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2022-03-18 13:05:16,542 INFO L87 Difference]: Start difference. First operand 1307 states and 1444 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:05:17,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:05:17,728 INFO L93 Difference]: Finished difference Result 1365 states and 1514 transitions. [2022-03-18 13:05:17,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 13:05:17,729 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 60 [2022-03-18 13:05:17,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:05:17,734 INFO L225 Difference]: With dead ends: 1365 [2022-03-18 13:05:17,734 INFO L226 Difference]: Without dead ends: 1320 [2022-03-18 13:05:17,743 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1129, Invalid=2531, Unknown=0, NotChecked=0, Total=3660 [2022-03-18 13:05:17,744 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 135 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:05:17,744 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 76 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 13:05:17,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-03-18 13:05:18,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2022-03-18 13:05:18,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1167 states have (on average 1.1182519280205656) internal successors, (1305), 1263 states have internal predecessors, (1305), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (99), 51 states have call predecessors, (99), 51 states have call successors, (99) [2022-03-18 13:05:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1457 transitions. [2022-03-18 13:05:18,334 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1457 transitions. Word has length 60 [2022-03-18 13:05:18,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:05:18,334 INFO L478 AbstractCegarLoop]: Abstraction has 1320 states and 1457 transitions. [2022-03-18 13:05:18,334 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:05:18,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1457 transitions. [2022-03-18 13:05:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 13:05:18,344 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:05:18,344 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:05:18,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-18 13:05:18,561 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-18 13:05:18,561 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:05:18,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:05:18,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1806167277, now seen corresponding path program 103 times [2022-03-18 13:05:18,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:05:18,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700406667] [2022-03-18 13:05:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:05:18,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:05:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:18,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:05:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:18,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:05:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:18,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 13:05:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:05:19,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:05:19,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700406667] [2022-03-18 13:05:19,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700406667] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:05:19,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906764160] [2022-03-18 13:05:19,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:05:19,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:05:19,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:05:19,235 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:05:19,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-18 13:05:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:19,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 13:05:19,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:05:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:05:19,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:05:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:05:20,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906764160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:05:20,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:05:20,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 49 [2022-03-18 13:05:20,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655733830] [2022-03-18 13:05:20,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:05:20,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 13:05:20,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:05:20,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 13:05:20,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2247, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 13:05:20,059 INFO L87 Difference]: Start difference. First operand 1320 states and 1457 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:05:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:05:23,683 INFO L93 Difference]: Finished difference Result 1470 states and 1624 transitions. [2022-03-18 13:05:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 13:05:23,684 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-03-18 13:05:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:05:23,694 INFO L225 Difference]: With dead ends: 1470 [2022-03-18 13:05:23,694 INFO L226 Difference]: Without dead ends: 1464 [2022-03-18 13:05:23,706 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=301, Invalid=7709, Unknown=0, NotChecked=0, Total=8010 [2022-03-18 13:05:23,707 INFO L912 BasicCegarLoop]: 149 mSDtfsCounter, 331 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 10084 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 10146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 10084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-18 13:05:23,707 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 371 Invalid, 10146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 10084 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-18 13:05:23,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-03-18 13:05:24,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1336. [2022-03-18 13:05:24,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1180 states have (on average 1.11864406779661) internal successors, (1320), 1278 states have internal predecessors, (1320), 54 states have call successors, (54), 5 states have call predecessors, (54), 101 states have return successors, (102), 52 states have call predecessors, (102), 52 states have call successors, (102) [2022-03-18 13:05:24,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 1476 transitions. [2022-03-18 13:05:24,335 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 1476 transitions. Word has length 61 [2022-03-18 13:05:24,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:05:24,335 INFO L478 AbstractCegarLoop]: Abstraction has 1336 states and 1476 transitions. [2022-03-18 13:05:24,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:05:24,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 1476 transitions. [2022-03-18 13:05:24,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 13:05:24,348 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:05:24,348 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:05:24,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-18 13:05:24,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:05:24,552 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:05:24,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:05:24,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1360021805, now seen corresponding path program 104 times [2022-03-18 13:05:24,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:05:24,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174141720] [2022-03-18 13:05:24,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:05:24,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:05:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:24,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:05:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:24,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:05:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:24,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 13:05:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:05:25,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:05:25,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174141720] [2022-03-18 13:05:25,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174141720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:05:25,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340430328] [2022-03-18 13:05:25,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:05:25,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:05:25,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:05:25,241 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:05:25,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-18 13:05:25,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:05:25,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:05:25,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-18 13:05:25,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:05:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:05:25,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:05:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:05:26,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340430328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:05:26,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:05:26,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 49 [2022-03-18 13:05:26,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365434861] [2022-03-18 13:05:26,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:05:26,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 13:05:26,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:05:26,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 13:05:26,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2243, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 13:05:26,066 INFO L87 Difference]: Start difference. First operand 1336 states and 1476 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:05:29,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:05:29,155 INFO L93 Difference]: Finished difference Result 1342 states and 1481 transitions. [2022-03-18 13:05:29,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 13:05:29,156 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-03-18 13:05:29,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:05:29,162 INFO L225 Difference]: With dead ends: 1342 [2022-03-18 13:05:29,162 INFO L226 Difference]: Without dead ends: 1320 [2022-03-18 13:05:29,174 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=303, Invalid=7353, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 13:05:29,174 INFO L912 BasicCegarLoop]: 134 mSDtfsCounter, 252 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 8622 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 8665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 8622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 13:05:29,175 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 346 Invalid, 8665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 8622 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 13:05:29,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-03-18 13:05:29,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2022-03-18 13:05:29,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1167 states have (on average 1.1182519280205656) internal successors, (1305), 1263 states have internal predecessors, (1305), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (100), 51 states have call predecessors, (100), 51 states have call successors, (100) [2022-03-18 13:05:29,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1458 transitions. [2022-03-18 13:05:29,833 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1458 transitions. Word has length 61 [2022-03-18 13:05:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:05:29,833 INFO L478 AbstractCegarLoop]: Abstraction has 1320 states and 1458 transitions. [2022-03-18 13:05:29,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:05:29,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1458 transitions. [2022-03-18 13:05:29,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 13:05:29,843 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:05:29,843 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:05:29,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-18 13:05:30,060 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:05:30,060 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:05:30,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:05:30,060 INFO L85 PathProgramCache]: Analyzing trace with hash -165892883, now seen corresponding path program 105 times [2022-03-18 13:05:30,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:05:30,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321698057] [2022-03-18 13:05:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:05:30,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:05:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:30,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:05:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:30,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:05:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:30,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 13:05:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:05:30,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:05:30,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321698057] [2022-03-18 13:05:30,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321698057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:05:30,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859638678] [2022-03-18 13:05:30,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:05:30,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:05:30,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:05:30,729 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:05:30,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-18 13:05:30,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-18 13:05:30,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:05:30,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 13:05:30,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:05:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:05:31,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:05:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:05:31,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859638678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:05:31,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:05:31,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 49 [2022-03-18 13:05:31,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461946427] [2022-03-18 13:05:31,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:05:31,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 13:05:31,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:05:31,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 13:05:31,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2239, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 13:05:31,770 INFO L87 Difference]: Start difference. First operand 1320 states and 1458 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:05:35,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:05:35,034 INFO L93 Difference]: Finished difference Result 1326 states and 1463 transitions. [2022-03-18 13:05:35,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 13:05:35,034 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-03-18 13:05:35,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:05:35,040 INFO L225 Difference]: With dead ends: 1326 [2022-03-18 13:05:35,040 INFO L226 Difference]: Without dead ends: 1302 [2022-03-18 13:05:35,067 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=305, Invalid=7005, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 13:05:35,068 INFO L912 BasicCegarLoop]: 114 mSDtfsCounter, 213 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7374 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 7416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 7374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:05:35,068 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 326 Invalid, 7416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 7374 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-18 13:05:35,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2022-03-18 13:05:35,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1302. [2022-03-18 13:05:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1152 states have (on average 1.1180555555555556) internal successors, (1288), 1246 states have internal predecessors, (1288), 52 states have call successors, (52), 5 states have call predecessors, (52), 97 states have return successors, (98), 50 states have call predecessors, (98), 50 states have call successors, (98) [2022-03-18 13:05:35,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1438 transitions. [2022-03-18 13:05:35,743 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1438 transitions. Word has length 61 [2022-03-18 13:05:35,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:05:35,743 INFO L478 AbstractCegarLoop]: Abstraction has 1302 states and 1438 transitions. [2022-03-18 13:05:35,743 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:05:35,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1438 transitions. [2022-03-18 13:05:35,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 13:05:35,754 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:05:35,754 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:05:35,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-18 13:05:35,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-18 13:05:35,967 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:05:35,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:05:35,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1490253523, now seen corresponding path program 106 times [2022-03-18 13:05:35,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:05:35,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965477122] [2022-03-18 13:05:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:05:35,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:05:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:36,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:05:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:36,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:05:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:36,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 13:05:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:05:36,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:05:36,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965477122] [2022-03-18 13:05:36,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965477122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:05:36,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339986692] [2022-03-18 13:05:36,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:05:36,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:05:36,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:05:36,608 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:05:36,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-18 13:05:36,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:05:36,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:05:36,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 13:05:36,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:05:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:05:37,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:05:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:05:37,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339986692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:05:37,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:05:37,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 49 [2022-03-18 13:05:37,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373629393] [2022-03-18 13:05:37,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:05:37,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 13:05:37,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:05:37,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 13:05:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2235, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 13:05:37,698 INFO L87 Difference]: Start difference. First operand 1302 states and 1438 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:05:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:05:40,248 INFO L93 Difference]: Finished difference Result 1308 states and 1443 transitions. [2022-03-18 13:05:40,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 13:05:40,248 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-03-18 13:05:40,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:05:40,255 INFO L225 Difference]: With dead ends: 1308 [2022-03-18 13:05:40,255 INFO L226 Difference]: Without dead ends: 1282 [2022-03-18 13:05:40,270 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=307, Invalid=6665, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 13:05:40,271 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 174 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 5425 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 5465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 5425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:05:40,271 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 281 Invalid, 5465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 5425 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 13:05:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2022-03-18 13:05:40,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1282. [2022-03-18 13:05:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1135 states have (on average 1.1180616740088105) internal successors, (1269), 1227 states have internal predecessors, (1269), 51 states have call successors, (51), 5 states have call predecessors, (51), 95 states have return successors, (96), 49 states have call predecessors, (96), 49 states have call successors, (96) [2022-03-18 13:05:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1416 transitions. [2022-03-18 13:05:40,885 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1416 transitions. Word has length 61 [2022-03-18 13:05:40,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:05:40,886 INFO L478 AbstractCegarLoop]: Abstraction has 1282 states and 1416 transitions. [2022-03-18 13:05:40,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:05:40,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1416 transitions. [2022-03-18 13:05:40,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 13:05:40,896 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:05:40,897 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:05:40,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-18 13:05:41,100 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-03-18 13:05:41,100 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:05:41,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:05:41,101 INFO L85 PathProgramCache]: Analyzing trace with hash 779054317, now seen corresponding path program 107 times [2022-03-18 13:05:41,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:05:41,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067096140] [2022-03-18 13:05:41,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:05:41,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:05:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:41,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:05:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:41,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:05:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:41,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 13:05:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:05:41,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:05:41,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067096140] [2022-03-18 13:05:41,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067096140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:05:41,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278722027] [2022-03-18 13:05:41,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:05:41,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:05:41,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:05:41,676 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:05:41,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-18 13:05:41,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-18 13:05:41,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:05:41,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 13:05:41,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:05:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:05:42,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:05:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:05:42,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278722027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:05:42,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:05:42,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 49 [2022-03-18 13:05:42,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547948034] [2022-03-18 13:05:42,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:05:42,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 13:05:42,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:05:42,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 13:05:42,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2231, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 13:05:42,791 INFO L87 Difference]: Start difference. First operand 1282 states and 1416 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:05:45,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:05:45,369 INFO L93 Difference]: Finished difference Result 1288 states and 1421 transitions. [2022-03-18 13:05:45,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 13:05:45,370 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-03-18 13:05:45,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:05:45,375 INFO L225 Difference]: With dead ends: 1288 [2022-03-18 13:05:45,375 INFO L226 Difference]: Without dead ends: 1260 [2022-03-18 13:05:45,383 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=309, Invalid=6333, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 13:05:45,384 INFO L912 BasicCegarLoop]: 74 mSDtfsCounter, 135 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4416 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 4454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 4416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:05:45,384 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 266 Invalid, 4454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 4416 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 13:05:45,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-03-18 13:05:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1260. [2022-03-18 13:05:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1116 states have (on average 1.118279569892473) internal successors, (1248), 1206 states have internal predecessors, (1248), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (94), 48 states have call predecessors, (94), 48 states have call successors, (94) [2022-03-18 13:05:45,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1392 transitions. [2022-03-18 13:05:45,936 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1392 transitions. Word has length 61 [2022-03-18 13:05:45,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:05:45,936 INFO L478 AbstractCegarLoop]: Abstraction has 1260 states and 1392 transitions. [2022-03-18 13:05:45,936 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:05:45,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1392 transitions. [2022-03-18 13:05:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 13:05:45,945 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:05:45,945 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:05:45,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-18 13:05:46,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:05:46,163 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:05:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:05:46,164 INFO L85 PathProgramCache]: Analyzing trace with hash 896190765, now seen corresponding path program 108 times [2022-03-18 13:05:46,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:05:46,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094470264] [2022-03-18 13:05:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:05:46,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:05:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:46,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:05:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:46,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:05:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:46,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 13:05:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:05:46,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:05:46,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094470264] [2022-03-18 13:05:46,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094470264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:05:46,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011214751] [2022-03-18 13:05:46,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:05:46,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:05:46,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:05:46,660 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:05:46,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-18 13:05:46,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 13:05:46,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:05:46,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-18 13:05:46,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:05:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:05:47,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:05:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:05:47,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011214751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:05:47,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:05:47,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 49 [2022-03-18 13:05:47,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858267966] [2022-03-18 13:05:47,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:05:47,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 13:05:47,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:05:47,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 13:05:47,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2227, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 13:05:47,838 INFO L87 Difference]: Start difference. First operand 1260 states and 1392 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:05:49,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:05:49,658 INFO L93 Difference]: Finished difference Result 1266 states and 1397 transitions. [2022-03-18 13:05:49,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 13:05:49,658 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-03-18 13:05:49,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:05:49,664 INFO L225 Difference]: With dead ends: 1266 [2022-03-18 13:05:49,664 INFO L226 Difference]: Without dead ends: 1236 [2022-03-18 13:05:49,672 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=311, Invalid=6009, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 13:05:49,672 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 95 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3040 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 3076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:05:49,672 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 231 Invalid, 3076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3040 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 13:05:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-03-18 13:05:50,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1236. [2022-03-18 13:05:50,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1095 states have (on average 1.1187214611872147) internal successors, (1225), 1183 states have internal predecessors, (1225), 49 states have call successors, (49), 5 states have call predecessors, (49), 91 states have return successors, (92), 47 states have call predecessors, (92), 47 states have call successors, (92) [2022-03-18 13:05:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1366 transitions. [2022-03-18 13:05:50,247 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1366 transitions. Word has length 61 [2022-03-18 13:05:50,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:05:50,247 INFO L478 AbstractCegarLoop]: Abstraction has 1236 states and 1366 transitions. [2022-03-18 13:05:50,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:05:50,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1366 transitions. [2022-03-18 13:05:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 13:05:50,256 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:05:50,256 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:05:50,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-18 13:05:50,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:05:50,472 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:05:50,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:05:50,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1063244563, now seen corresponding path program 109 times [2022-03-18 13:05:50,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:05:50,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482842693] [2022-03-18 13:05:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:05:50,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:05:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:50,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:05:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:50,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:05:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:50,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 13:05:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 13:05:50,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:05:50,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482842693] [2022-03-18 13:05:50,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482842693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:05:50,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079647269] [2022-03-18 13:05:50,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:05:50,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:05:50,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:05:50,893 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:05:50,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-18 13:05:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:51,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 13:05:51,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:05:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 13:05:51,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:05:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 13:05:52,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079647269] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:05:52,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:05:52,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 49 [2022-03-18 13:05:52,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822618341] [2022-03-18 13:05:52,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:05:52,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 13:05:52,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:05:52,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 13:05:52,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2223, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 13:05:52,056 INFO L87 Difference]: Start difference. First operand 1236 states and 1366 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:05:53,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:05:53,511 INFO L93 Difference]: Finished difference Result 1254 states and 1387 transitions. [2022-03-18 13:05:53,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 13:05:53,511 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-03-18 13:05:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:05:53,519 INFO L225 Difference]: With dead ends: 1254 [2022-03-18 13:05:53,519 INFO L226 Difference]: Without dead ends: 1248 [2022-03-18 13:05:53,527 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=313, Invalid=5693, Unknown=0, NotChecked=0, Total=6006 [2022-03-18 13:05:53,527 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 13:05:53,527 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 213 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 13:05:53,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-03-18 13:05:54,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1246. [2022-03-18 13:05:54,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1102 states have (on average 1.1197822141560798) internal successors, (1234), 1192 states have internal predecessors, (1234), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (95), 48 states have call predecessors, (95), 48 states have call successors, (95) [2022-03-18 13:05:54,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 1379 transitions. [2022-03-18 13:05:54,124 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 1379 transitions. Word has length 61 [2022-03-18 13:05:54,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:05:54,125 INFO L478 AbstractCegarLoop]: Abstraction has 1246 states and 1379 transitions. [2022-03-18 13:05:54,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:05:54,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 1379 transitions. [2022-03-18 13:05:54,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-18 13:05:54,135 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:05:54,135 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:05:54,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-18 13:05:54,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-03-18 13:05:54,339 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:05:54,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:05:54,340 INFO L85 PathProgramCache]: Analyzing trace with hash -862861684, now seen corresponding path program 110 times [2022-03-18 13:05:54,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:05:54,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163192798] [2022-03-18 13:05:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:05:54,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:05:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:54,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:05:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:54,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:05:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:54,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 13:05:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:05:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:05:54,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:05:54,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163192798] [2022-03-18 13:05:54,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163192798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:05:54,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834760566] [2022-03-18 13:05:54,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:05:54,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:05:54,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:05:54,965 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:05:54,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-18 13:05:55,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:05:55,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:05:55,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 13:05:55,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:05:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:05:56,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:05:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:05:57,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834760566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:05:57,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:05:57,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 91 [2022-03-18 13:05:57,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136677436] [2022-03-18 13:05:57,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:05:57,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-18 13:05:57,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:05:57,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-18 13:05:57,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=7884, Unknown=0, NotChecked=0, Total=8190 [2022-03-18 13:05:57,845 INFO L87 Difference]: Start difference. First operand 1246 states and 1379 transitions. Second operand has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:06:06,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:06:06,159 INFO L93 Difference]: Finished difference Result 1392 states and 1550 transitions. [2022-03-18 13:06:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-18 13:06:06,160 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-03-18 13:06:06,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:06:06,178 INFO L225 Difference]: With dead ends: 1392 [2022-03-18 13:06:06,178 INFO L226 Difference]: Without dead ends: 1378 [2022-03-18 13:06:06,189 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3152 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1200, Invalid=20262, Unknown=0, NotChecked=0, Total=21462 [2022-03-18 13:06:06,189 INFO L912 BasicCegarLoop]: 154 mSDtfsCounter, 2415 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 11131 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2420 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 11387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 11131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-18 13:06:06,189 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2420 Valid, 411 Invalid, 11387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 11131 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-18 13:06:06,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2022-03-18 13:06:06,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1369. [2022-03-18 13:06:06,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1210 states have (on average 1.1190082644628099) internal successors, (1354), 1310 states have internal predecessors, (1354), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (110), 53 states have call predecessors, (110), 53 states have call successors, (110) [2022-03-18 13:06:06,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1519 transitions. [2022-03-18 13:06:06,839 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1519 transitions. Word has length 62 [2022-03-18 13:06:06,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:06:06,839 INFO L478 AbstractCegarLoop]: Abstraction has 1369 states and 1519 transitions. [2022-03-18 13:06:06,839 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:06:06,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1519 transitions. [2022-03-18 13:06:06,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-18 13:06:06,881 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:06:06,881 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:06:06,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-18 13:06:07,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:06:07,081 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:06:07,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:06:07,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1466475567, now seen corresponding path program 111 times [2022-03-18 13:06:07,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:06:07,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70883559] [2022-03-18 13:06:07,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:06:07,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:06:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:07,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:06:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:07,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:06:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:07,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-18 13:06:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:06:07,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:06:07,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70883559] [2022-03-18 13:06:07,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70883559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:06:07,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797152648] [2022-03-18 13:06:07,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:06:07,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:06:07,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:06:07,700 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:06:07,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-18 13:06:07,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-18 13:06:07,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:06:07,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 13:06:07,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:06:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:06:08,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:06:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:06:09,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797152648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:06:09,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:06:09,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 91 [2022-03-18 13:06:09,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257611664] [2022-03-18 13:06:09,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:06:09,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-18 13:06:09,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:06:09,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-18 13:06:09,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=7884, Unknown=0, NotChecked=0, Total=8190 [2022-03-18 13:06:09,971 INFO L87 Difference]: Start difference. First operand 1369 states and 1519 transitions. Second operand has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:06:17,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:06:17,835 INFO L93 Difference]: Finished difference Result 1384 states and 1534 transitions. [2022-03-18 13:06:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-18 13:06:17,835 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-03-18 13:06:17,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:06:17,857 INFO L225 Difference]: With dead ends: 1384 [2022-03-18 13:06:17,857 INFO L226 Difference]: Without dead ends: 1372 [2022-03-18 13:06:17,867 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1200, Invalid=20262, Unknown=0, NotChecked=0, Total=21462 [2022-03-18 13:06:17,867 INFO L912 BasicCegarLoop]: 158 mSDtfsCounter, 2395 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 10619 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2422 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 10849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 10619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-18 13:06:17,868 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2422 Valid, 395 Invalid, 10849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 10619 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-18 13:06:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2022-03-18 13:06:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1370. [2022-03-18 13:06:18,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1211 states have (on average 1.1189099917423617) internal successors, (1355), 1311 states have internal predecessors, (1355), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2022-03-18 13:06:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 1514 transitions. [2022-03-18 13:06:18,530 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 1514 transitions. Word has length 62 [2022-03-18 13:06:18,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:06:18,531 INFO L478 AbstractCegarLoop]: Abstraction has 1370 states and 1514 transitions. [2022-03-18 13:06:18,531 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:06:18,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 1514 transitions. [2022-03-18 13:06:18,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-18 13:06:18,542 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:06:18,542 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:06:18,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-18 13:06:18,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:06:18,755 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:06:18,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:06:18,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1546673523, now seen corresponding path program 112 times [2022-03-18 13:06:18,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:06:18,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221556727] [2022-03-18 13:06:18,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:06:18,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:06:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:18,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:06:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:18,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:06:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:18,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 13:06:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-18 13:06:18,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:06:18,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221556727] [2022-03-18 13:06:18,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221556727] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:06:18,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395806011] [2022-03-18 13:06:18,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:06:18,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:06:18,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:06:18,889 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:06:18,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-18 13:06:19,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:06:19,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:06:19,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 13:06:19,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:06:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-18 13:06:19,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:06:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-18 13:06:19,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395806011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:06:19,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:06:19,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 27 [2022-03-18 13:06:19,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898349316] [2022-03-18 13:06:19,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:06:19,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 13:06:19,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:06:19,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 13:06:19,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-03-18 13:06:19,283 INFO L87 Difference]: Start difference. First operand 1370 states and 1514 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:06:20,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:06:20,908 INFO L93 Difference]: Finished difference Result 1616 states and 1803 transitions. [2022-03-18 13:06:20,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-18 13:06:20,909 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 62 [2022-03-18 13:06:20,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:06:20,919 INFO L225 Difference]: With dead ends: 1616 [2022-03-18 13:06:20,919 INFO L226 Difference]: Without dead ends: 1554 [2022-03-18 13:06:20,935 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1216, Invalid=3754, Unknown=0, NotChecked=0, Total=4970 [2022-03-18 13:06:20,936 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 149 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:06:20,936 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 103 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 13:06:20,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2022-03-18 13:06:21,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1512. [2022-03-18 13:06:21,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1353 states have (on average 1.1175166297117516) internal successors, (1512), 1453 states have internal predecessors, (1512), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2022-03-18 13:06:21,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1671 transitions. [2022-03-18 13:06:21,771 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1671 transitions. Word has length 62 [2022-03-18 13:06:21,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:06:21,771 INFO L478 AbstractCegarLoop]: Abstraction has 1512 states and 1671 transitions. [2022-03-18 13:06:21,771 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:06:21,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1671 transitions. [2022-03-18 13:06:21,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-18 13:06:21,785 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:06:21,786 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:06:21,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-18 13:06:21,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2022-03-18 13:06:21,999 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:06:21,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:06:22,000 INFO L85 PathProgramCache]: Analyzing trace with hash 494600014, now seen corresponding path program 113 times [2022-03-18 13:06:22,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:06:22,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167003786] [2022-03-18 13:06:22,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:06:22,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:06:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:22,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:06:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:22,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:06:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:22,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-18 13:06:22,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-18 13:06:22,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:06:22,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167003786] [2022-03-18 13:06:22,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167003786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:06:22,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019135930] [2022-03-18 13:06:22,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:06:22,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:06:22,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:06:22,134 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:06:22,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-18 13:06:22,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-18 13:06:22,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:06:22,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 13:06:22,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:06:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-18 13:06:22,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:06:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-18 13:06:22,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019135930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:06:22,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:06:22,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 27 [2022-03-18 13:06:22,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542528062] [2022-03-18 13:06:22,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:06:22,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 13:06:22,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:06:22,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 13:06:22,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-03-18 13:06:22,498 INFO L87 Difference]: Start difference. First operand 1512 states and 1671 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:06:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:06:24,010 INFO L93 Difference]: Finished difference Result 2555 states and 2807 transitions. [2022-03-18 13:06:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-18 13:06:24,011 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2022-03-18 13:06:24,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:06:24,046 INFO L225 Difference]: With dead ends: 2555 [2022-03-18 13:06:24,046 INFO L226 Difference]: Without dead ends: 1696 [2022-03-18 13:06:24,064 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1216, Invalid=3754, Unknown=0, NotChecked=0, Total=4970 [2022-03-18 13:06:24,065 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 206 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:06:24,065 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 93 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 13:06:24,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2022-03-18 13:06:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1654. [2022-03-18 13:06:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1495 states have (on average 1.1163879598662207) internal successors, (1669), 1595 states have internal predecessors, (1669), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2022-03-18 13:06:25,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 1828 transitions. [2022-03-18 13:06:25,015 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 1828 transitions. Word has length 62 [2022-03-18 13:06:25,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:06:25,015 INFO L478 AbstractCegarLoop]: Abstraction has 1654 states and 1828 transitions. [2022-03-18 13:06:25,015 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:06:25,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 1828 transitions. [2022-03-18 13:06:25,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 13:06:25,031 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:06:25,031 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:06:25,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-18 13:06:25,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:06:25,247 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:06:25,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:06:25,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1491597194, now seen corresponding path program 114 times [2022-03-18 13:06:25,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:06:25,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947255777] [2022-03-18 13:06:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:06:25,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:06:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:25,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:06:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:25,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:06:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:25,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-18 13:06:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:06:26,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:06:26,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947255777] [2022-03-18 13:06:26,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947255777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:06:26,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836610090] [2022-03-18 13:06:26,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:06:26,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:06:26,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:06:26,126 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:06:26,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-18 13:06:26,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-18 13:06:26,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:06:26,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-18 13:06:26,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:06:26,628 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:06:26,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:06:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:06:26,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836610090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:06:26,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:06:26,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 51 [2022-03-18 13:06:26,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854407315] [2022-03-18 13:06:26,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:06:26,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 13:06:26,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:06:26,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 13:06:26,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2441, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 13:06:26,930 INFO L87 Difference]: Start difference. First operand 1654 states and 1828 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:06:31,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:06:31,591 INFO L93 Difference]: Finished difference Result 1824 states and 2017 transitions. [2022-03-18 13:06:31,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 13:06:31,591 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-03-18 13:06:31,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:06:31,607 INFO L225 Difference]: With dead ends: 1824 [2022-03-18 13:06:31,608 INFO L226 Difference]: Without dead ends: 1818 [2022-03-18 13:06:31,623 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=313, Invalid=8429, Unknown=0, NotChecked=0, Total=8742 [2022-03-18 13:06:31,623 INFO L912 BasicCegarLoop]: 161 mSDtfsCounter, 354 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 11129 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 11193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 11129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:06:31,623 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 388 Invalid, 11193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 11129 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-18 13:06:31,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2022-03-18 13:06:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1670. [2022-03-18 13:06:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1508 states have (on average 1.1167108753315649) internal successors, (1684), 1610 states have internal predecessors, (1684), 56 states have call successors, (56), 5 states have call predecessors, (56), 105 states have return successors, (107), 54 states have call predecessors, (107), 54 states have call successors, (107) [2022-03-18 13:06:32,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 1847 transitions. [2022-03-18 13:06:32,540 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 1847 transitions. Word has length 63 [2022-03-18 13:06:32,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:06:32,541 INFO L478 AbstractCegarLoop]: Abstraction has 1670 states and 1847 transitions. [2022-03-18 13:06:32,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:06:32,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 1847 transitions. [2022-03-18 13:06:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 13:06:32,555 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:06:32,556 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:06:32,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-18 13:06:32,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-18 13:06:32,773 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:06:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:06:32,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1845015914, now seen corresponding path program 115 times [2022-03-18 13:06:32,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:06:32,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014007919] [2022-03-18 13:06:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:06:32,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:06:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:32,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:06:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:32,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:06:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:33,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-18 13:06:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:33,551 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:06:33,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:06:33,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014007919] [2022-03-18 13:06:33,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014007919] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:06:33,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217308944] [2022-03-18 13:06:33,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:06:33,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:06:33,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:06:33,553 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:06:33,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-18 13:06:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:33,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 13:06:33,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:06:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:06:34,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:06:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:06:34,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217308944] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:06:34,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:06:34,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 51 [2022-03-18 13:06:34,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962971663] [2022-03-18 13:06:34,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:06:34,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 13:06:34,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:06:34,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 13:06:34,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2437, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 13:06:34,471 INFO L87 Difference]: Start difference. First operand 1670 states and 1847 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:06:37,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:06:37,905 INFO L93 Difference]: Finished difference Result 1676 states and 1852 transitions. [2022-03-18 13:06:37,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 13:06:37,905 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-03-18 13:06:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:06:37,915 INFO L225 Difference]: With dead ends: 1676 [2022-03-18 13:06:37,915 INFO L226 Difference]: Without dead ends: 1654 [2022-03-18 13:06:37,932 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=315, Invalid=8057, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 13:06:37,933 INFO L912 BasicCegarLoop]: 141 mSDtfsCounter, 276 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 9128 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 9175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 9128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 13:06:37,933 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 353 Invalid, 9175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 9128 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 13:06:37,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2022-03-18 13:06:38,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1654. [2022-03-18 13:06:38,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1495 states have (on average 1.1163879598662207) internal successors, (1669), 1595 states have internal predecessors, (1669), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (105), 53 states have call predecessors, (105), 53 states have call successors, (105) [2022-03-18 13:06:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 1829 transitions. [2022-03-18 13:06:38,839 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 1829 transitions. Word has length 63 [2022-03-18 13:06:38,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:06:38,840 INFO L478 AbstractCegarLoop]: Abstraction has 1654 states and 1829 transitions. [2022-03-18 13:06:38,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:06:38,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 1829 transitions. [2022-03-18 13:06:38,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 13:06:38,857 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:06:38,857 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:06:38,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-18 13:06:39,069 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-18 13:06:39,069 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:06:39,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:06:39,069 INFO L85 PathProgramCache]: Analyzing trace with hash 891221002, now seen corresponding path program 116 times [2022-03-18 13:06:39,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:06:39,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904624164] [2022-03-18 13:06:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:06:39,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:06:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:39,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:06:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:39,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:06:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:39,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-18 13:06:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:06:39,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:06:39,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904624164] [2022-03-18 13:06:39,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904624164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:06:39,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125473665] [2022-03-18 13:06:39,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:06:39,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:06:39,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:06:39,787 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:06:39,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-18 13:06:39,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:06:39,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:06:39,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-18 13:06:39,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:06:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:06:40,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:06:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:06:40,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125473665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:06:40,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:06:40,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 51 [2022-03-18 13:06:40,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891851703] [2022-03-18 13:06:40,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:06:40,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 13:06:40,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:06:40,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 13:06:40,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2433, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 13:06:40,762 INFO L87 Difference]: Start difference. First operand 1654 states and 1829 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:06:44,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:06:44,618 INFO L93 Difference]: Finished difference Result 1660 states and 1834 transitions. [2022-03-18 13:06:44,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 13:06:44,618 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-03-18 13:06:44,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:06:44,637 INFO L225 Difference]: With dead ends: 1660 [2022-03-18 13:06:44,637 INFO L226 Difference]: Without dead ends: 1636 [2022-03-18 13:06:44,651 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=317, Invalid=7693, Unknown=0, NotChecked=0, Total=8010 [2022-03-18 13:06:44,652 INFO L912 BasicCegarLoop]: 121 mSDtfsCounter, 237 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7883 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 7929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 7883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:06:44,652 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 333 Invalid, 7929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 7883 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 13:06:44,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2022-03-18 13:06:45,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1636. [2022-03-18 13:06:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1480 states have (on average 1.1162162162162161) internal successors, (1652), 1578 states have internal predecessors, (1652), 54 states have call successors, (54), 5 states have call predecessors, (54), 101 states have return successors, (103), 52 states have call predecessors, (103), 52 states have call successors, (103) [2022-03-18 13:06:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1809 transitions. [2022-03-18 13:06:45,598 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1809 transitions. Word has length 63 [2022-03-18 13:06:45,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:06:45,598 INFO L478 AbstractCegarLoop]: Abstraction has 1636 states and 1809 transitions. [2022-03-18 13:06:45,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:06:45,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1809 transitions. [2022-03-18 13:06:45,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 13:06:45,612 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:06:45,612 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:06:45,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-18 13:06:45,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-18 13:06:45,828 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:06:45,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:06:45,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1351141142, now seen corresponding path program 117 times [2022-03-18 13:06:45,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:06:45,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124914638] [2022-03-18 13:06:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:06:45,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:06:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:45,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:06:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:45,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:06:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:46,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-18 13:06:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:06:46,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:06:46,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124914638] [2022-03-18 13:06:46,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124914638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:06:46,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560279203] [2022-03-18 13:06:46,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:06:46,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:06:46,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:06:46,469 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:06:46,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-18 13:06:46,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-18 13:06:46,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:06:46,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 13:06:46,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:06:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:06:47,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:06:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:06:47,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560279203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:06:47,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:06:47,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 51 [2022-03-18 13:06:47,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4634373] [2022-03-18 13:06:47,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:06:47,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 13:06:47,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:06:47,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 13:06:47,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2429, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 13:06:47,644 INFO L87 Difference]: Start difference. First operand 1636 states and 1809 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:06:50,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:06:50,412 INFO L93 Difference]: Finished difference Result 1642 states and 1814 transitions. [2022-03-18 13:06:50,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 13:06:50,413 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-03-18 13:06:50,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:06:50,420 INFO L225 Difference]: With dead ends: 1642 [2022-03-18 13:06:50,421 INFO L226 Difference]: Without dead ends: 1616 [2022-03-18 13:06:50,434 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=319, Invalid=7337, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 13:06:50,434 INFO L912 BasicCegarLoop]: 101 mSDtfsCounter, 198 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6191 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 6235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 6191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 13:06:50,434 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 298 Invalid, 6235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 6191 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 13:06:50,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-03-18 13:06:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1616. [2022-03-18 13:06:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1463 states have (on average 1.1161995898838004) internal successors, (1633), 1559 states have internal predecessors, (1633), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (101), 51 states have call predecessors, (101), 51 states have call successors, (101) [2022-03-18 13:06:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 1787 transitions. [2022-03-18 13:06:51,315 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 1787 transitions. Word has length 63 [2022-03-18 13:06:51,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:06:51,315 INFO L478 AbstractCegarLoop]: Abstraction has 1616 states and 1787 transitions. [2022-03-18 13:06:51,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:06:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 1787 transitions. [2022-03-18 13:06:51,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 13:06:51,331 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:06:51,331 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:06:51,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-18 13:06:51,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:06:51,547 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:06:51,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:06:51,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1646063754, now seen corresponding path program 118 times [2022-03-18 13:06:51,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:06:51,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173753832] [2022-03-18 13:06:51,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:06:51,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:06:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:51,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:06:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:51,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:06:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:51,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-18 13:06:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:06:52,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:06:52,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173753832] [2022-03-18 13:06:52,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173753832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:06:52,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958229451] [2022-03-18 13:06:52,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:06:52,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:06:52,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:06:52,124 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:06:52,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-18 13:06:52,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:06:52,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:06:52,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 13:06:52,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:06:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:06:52,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:06:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:06:53,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958229451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:06:53,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:06:53,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 51 [2022-03-18 13:06:53,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521448614] [2022-03-18 13:06:53,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:06:53,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 13:06:53,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:06:53,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 13:06:53,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2425, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 13:06:53,134 INFO L87 Difference]: Start difference. First operand 1616 states and 1787 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:06:56,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:06:56,025 INFO L93 Difference]: Finished difference Result 1622 states and 1792 transitions. [2022-03-18 13:06:56,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 13:06:56,026 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-03-18 13:06:56,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:06:56,034 INFO L225 Difference]: With dead ends: 1622 [2022-03-18 13:06:56,034 INFO L226 Difference]: Without dead ends: 1594 [2022-03-18 13:06:56,049 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=321, Invalid=6989, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 13:06:56,050 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 158 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5383 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 5425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 5383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:06:56,050 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 293 Invalid, 5425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 5383 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 13:06:56,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2022-03-18 13:06:56,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2022-03-18 13:06:56,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1444 states have (on average 1.1163434903047091) internal successors, (1612), 1538 states have internal predecessors, (1612), 52 states have call successors, (52), 5 states have call predecessors, (52), 97 states have return successors, (99), 50 states have call predecessors, (99), 50 states have call successors, (99) [2022-03-18 13:06:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 1763 transitions. [2022-03-18 13:06:56,892 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 1763 transitions. Word has length 63 [2022-03-18 13:06:56,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:06:56,892 INFO L478 AbstractCegarLoop]: Abstraction has 1594 states and 1763 transitions. [2022-03-18 13:06:56,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:06:56,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 1763 transitions. [2022-03-18 13:06:56,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 13:06:56,905 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:06:56,905 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:06:56,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-18 13:06:57,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-03-18 13:06:57,119 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:06:57,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:06:57,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1439349866, now seen corresponding path program 119 times [2022-03-18 13:06:57,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:06:57,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375184962] [2022-03-18 13:06:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:06:57,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:06:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:57,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:06:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:57,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:06:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:57,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-18 13:06:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:06:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:06:57,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:06:57,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375184962] [2022-03-18 13:06:57,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375184962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:06:57,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203709460] [2022-03-18 13:06:57,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:06:57,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:06:57,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:06:57,636 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:06:57,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-18 13:06:57,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-18 13:06:57,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:06:57,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 13:06:57,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:06:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:06:58,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:06:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:06:58,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203709460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:06:58,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:06:58,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 51 [2022-03-18 13:06:58,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919375396] [2022-03-18 13:06:58,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:06:58,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 13:06:58,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:06:58,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 13:06:58,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2421, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 13:06:58,661 INFO L87 Difference]: Start difference. First operand 1594 states and 1763 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:07:00,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:07:00,773 INFO L93 Difference]: Finished difference Result 1600 states and 1768 transitions. [2022-03-18 13:07:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 13:07:00,773 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-03-18 13:07:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:07:00,780 INFO L225 Difference]: With dead ends: 1600 [2022-03-18 13:07:00,780 INFO L226 Difference]: Without dead ends: 1570 [2022-03-18 13:07:00,798 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=323, Invalid=6649, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 13:07:00,798 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 121 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 3651 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 3693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:07:00,798 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 250 Invalid, 3693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3651 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 13:07:00,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2022-03-18 13:07:01,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1570. [2022-03-18 13:07:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1423 states have (on average 1.1166549543218551) internal successors, (1589), 1515 states have internal predecessors, (1589), 51 states have call successors, (51), 5 states have call predecessors, (51), 95 states have return successors, (97), 49 states have call predecessors, (97), 49 states have call successors, (97) [2022-03-18 13:07:01,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 1737 transitions. [2022-03-18 13:07:01,626 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 1737 transitions. Word has length 63 [2022-03-18 13:07:01,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:07:01,626 INFO L478 AbstractCegarLoop]: Abstraction has 1570 states and 1737 transitions. [2022-03-18 13:07:01,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:07:01,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 1737 transitions. [2022-03-18 13:07:01,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 13:07:01,639 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:07:01,639 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:07:01,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-18 13:07:01,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-18 13:07:01,863 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:07:01,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:07:01,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1543877185, now seen corresponding path program 120 times [2022-03-18 13:07:01,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:07:01,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886701013] [2022-03-18 13:07:01,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:07:01,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:07:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:01,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:07:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:01,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:07:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:01,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 13:07:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 13:07:02,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:07:02,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886701013] [2022-03-18 13:07:02,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886701013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:07:02,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543834250] [2022-03-18 13:07:02,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:07:02,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:07:02,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:07:02,242 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:07:02,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-18 13:07:02,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 13:07:02,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:07:02,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 13:07:02,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:07:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-18 13:07:02,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:07:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-18 13:07:03,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543834250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:07:03,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:07:03,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 57 [2022-03-18 13:07:03,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790194344] [2022-03-18 13:07:03,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:07:03,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 13:07:03,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:07:03,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 13:07:03,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2989, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 13:07:03,510 INFO L87 Difference]: Start difference. First operand 1570 states and 1737 transitions. Second operand has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:07:07,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:07:07,371 INFO L93 Difference]: Finished difference Result 1690 states and 1883 transitions. [2022-03-18 13:07:07,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 13:07:07,371 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-03-18 13:07:07,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:07:07,405 INFO L225 Difference]: With dead ends: 1690 [2022-03-18 13:07:07,405 INFO L226 Difference]: Without dead ends: 1670 [2022-03-18 13:07:07,420 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=580, Invalid=7252, Unknown=0, NotChecked=0, Total=7832 [2022-03-18 13:07:07,420 INFO L912 BasicCegarLoop]: 107 mSDtfsCounter, 848 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 4949 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 5043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 4949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-18 13:07:07,420 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 274 Invalid, 5043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 4949 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-18 13:07:07,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-03-18 13:07:08,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1665. [2022-03-18 13:07:08,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1479 states have (on average 1.1115618661257607) internal successors, (1644), 1597 states have internal predecessors, (1644), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (136), 62 states have call predecessors, (136), 62 states have call successors, (136) [2022-03-18 13:07:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 1844 transitions. [2022-03-18 13:07:08,519 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 1844 transitions. Word has length 63 [2022-03-18 13:07:08,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:07:08,519 INFO L478 AbstractCegarLoop]: Abstraction has 1665 states and 1844 transitions. [2022-03-18 13:07:08,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:07:08,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 1844 transitions. [2022-03-18 13:07:08,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 13:07:08,534 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:07:08,534 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:07:08,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-18 13:07:08,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-18 13:07:08,751 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:07:08,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:07:08,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1599476470, now seen corresponding path program 121 times [2022-03-18 13:07:08,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:07:08,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304992039] [2022-03-18 13:07:08,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:07:08,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:07:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:08,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:07:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:08,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:07:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:08,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-18 13:07:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 13:07:09,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:07:09,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304992039] [2022-03-18 13:07:09,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304992039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:07:09,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937264512] [2022-03-18 13:07:09,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:07:09,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:07:09,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:07:09,200 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:07:09,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-18 13:07:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:09,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-18 13:07:09,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:07:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 13:07:10,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:07:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 13:07:10,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937264512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:07:10,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:07:10,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 51 [2022-03-18 13:07:10,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009154163] [2022-03-18 13:07:10,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:07:10,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 13:07:10,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:07:10,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 13:07:10,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2417, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 13:07:10,378 INFO L87 Difference]: Start difference. First operand 1665 states and 1844 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:07:12,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:07:12,507 INFO L93 Difference]: Finished difference Result 1683 states and 1866 transitions. [2022-03-18 13:07:12,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 13:07:12,507 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-03-18 13:07:12,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:07:12,519 INFO L225 Difference]: With dead ends: 1683 [2022-03-18 13:07:12,520 INFO L226 Difference]: Without dead ends: 1663 [2022-03-18 13:07:12,534 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=325, Invalid=6317, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 13:07:12,535 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2606 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:07:12,535 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 228 Invalid, 2646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2606 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 13:07:12,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2022-03-18 13:07:13,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1658. [2022-03-18 13:07:13,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1472 states have (on average 1.1127717391304348) internal successors, (1638), 1590 states have internal predecessors, (1638), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (136), 62 states have call predecessors, (136), 62 states have call successors, (136) [2022-03-18 13:07:13,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 1838 transitions. [2022-03-18 13:07:13,403 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 1838 transitions. Word has length 63 [2022-03-18 13:07:13,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:07:13,403 INFO L478 AbstractCegarLoop]: Abstraction has 1658 states and 1838 transitions. [2022-03-18 13:07:13,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:07:13,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 1838 transitions. [2022-03-18 13:07:13,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 13:07:13,418 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:07:13,418 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:07:13,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-18 13:07:13,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:07:13,635 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:07:13,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:07:13,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1883683963, now seen corresponding path program 122 times [2022-03-18 13:07:13,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:07:13,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307508655] [2022-03-18 13:07:13,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:07:13,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:07:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:13,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:07:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:13,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:07:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:13,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 13:07:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 13:07:13,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:07:13,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307508655] [2022-03-18 13:07:13,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307508655] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:07:13,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797899137] [2022-03-18 13:07:13,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:07:13,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:07:13,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:07:13,982 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:07:13,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-18 13:07:14,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:07:14,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:07:14,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 13:07:14,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:07:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-18 13:07:14,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:07:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-18 13:07:15,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797899137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:07:15,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:07:15,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 57 [2022-03-18 13:07:15,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473074817] [2022-03-18 13:07:15,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:07:15,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 13:07:15,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:07:15,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 13:07:15,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2989, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 13:07:15,450 INFO L87 Difference]: Start difference. First operand 1658 states and 1838 transitions. Second operand has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:07:18,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:07:18,479 INFO L93 Difference]: Finished difference Result 1672 states and 1851 transitions. [2022-03-18 13:07:18,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 13:07:18,479 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-03-18 13:07:18,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:07:18,488 INFO L225 Difference]: With dead ends: 1672 [2022-03-18 13:07:18,488 INFO L226 Difference]: Without dead ends: 1642 [2022-03-18 13:07:18,504 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 92 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=580, Invalid=7252, Unknown=0, NotChecked=0, Total=7832 [2022-03-18 13:07:18,505 INFO L912 BasicCegarLoop]: 103 mSDtfsCounter, 1144 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 4384 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 4477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:07:18,505 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1159 Valid, 250 Invalid, 4477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4384 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 13:07:18,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2022-03-18 13:07:19,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1640. [2022-03-18 13:07:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1454 states have (on average 1.1127922971114168) internal successors, (1618), 1572 states have internal predecessors, (1618), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (124), 62 states have call predecessors, (124), 62 states have call successors, (124) [2022-03-18 13:07:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 1806 transitions. [2022-03-18 13:07:19,353 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 1806 transitions. Word has length 63 [2022-03-18 13:07:19,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:07:19,353 INFO L478 AbstractCegarLoop]: Abstraction has 1640 states and 1806 transitions. [2022-03-18 13:07:19,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:07:19,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 1806 transitions. [2022-03-18 13:07:19,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 13:07:19,371 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:07:19,371 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:07:19,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-03-18 13:07:19,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:07:19,588 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:07:19,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:07:19,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2024599665, now seen corresponding path program 123 times [2022-03-18 13:07:19,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:07:19,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089609370] [2022-03-18 13:07:19,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:07:19,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:07:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:19,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:07:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:19,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:07:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:19,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-18 13:07:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:07:20,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:07:20,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089609370] [2022-03-18 13:07:20,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089609370] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:07:20,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095630650] [2022-03-18 13:07:20,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:07:20,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:07:20,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:07:20,198 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:07:20,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-18 13:07:20,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-18 13:07:20,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:07:20,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 13:07:20,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:07:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:07:21,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:07:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:07:23,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095630650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:07:23,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:07:23,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 97 [2022-03-18 13:07:23,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234948443] [2022-03-18 13:07:23,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:07:23,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-18 13:07:23,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:07:23,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-18 13:07:23,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=8985, Unknown=0, NotChecked=0, Total=9312 [2022-03-18 13:07:23,379 INFO L87 Difference]: Start difference. First operand 1640 states and 1806 transitions. Second operand has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:07:32,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:07:32,453 INFO L93 Difference]: Finished difference Result 1814 states and 2009 transitions. [2022-03-18 13:07:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-18 13:07:32,453 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2022-03-18 13:07:32,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:07:32,483 INFO L225 Difference]: With dead ends: 1814 [2022-03-18 13:07:32,483 INFO L226 Difference]: Without dead ends: 1800 [2022-03-18 13:07:32,503 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3617 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1330, Invalid=23162, Unknown=0, NotChecked=0, Total=24492 [2022-03-18 13:07:32,503 INFO L912 BasicCegarLoop]: 164 mSDtfsCounter, 2708 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 12532 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2713 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 12821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 12532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:07:32,503 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2713 Valid, 426 Invalid, 12821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 12532 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-03-18 13:07:32,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2022-03-18 13:07:33,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1791. [2022-03-18 13:07:33,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1587 states have (on average 1.1121613106490233) internal successors, (1765), 1717 states have internal predecessors, (1765), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (142), 68 states have call predecessors, (142), 68 states have call successors, (142) [2022-03-18 13:07:33,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 1977 transitions. [2022-03-18 13:07:33,451 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 1977 transitions. Word has length 64 [2022-03-18 13:07:33,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:07:33,451 INFO L478 AbstractCegarLoop]: Abstraction has 1791 states and 1977 transitions. [2022-03-18 13:07:33,451 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:07:33,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 1977 transitions. [2022-03-18 13:07:33,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 13:07:33,468 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:07:33,468 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:07:33,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-18 13:07:33,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:07:33,684 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:07:33,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:07:33,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1465378380, now seen corresponding path program 124 times [2022-03-18 13:07:33,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:07:33,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435929168] [2022-03-18 13:07:33,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:07:33,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:07:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:33,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:07:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:33,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:07:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:33,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 13:07:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:07:34,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:07:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435929168] [2022-03-18 13:07:34,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435929168] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:07:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790146633] [2022-03-18 13:07:34,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:07:34,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:07:34,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:07:34,314 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:07:34,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-18 13:07:34,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:07:34,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:07:34,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 13:07:34,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:07:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:07:35,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:07:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:07:37,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790146633] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:07:37,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:07:37,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 97 [2022-03-18 13:07:37,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123118246] [2022-03-18 13:07:37,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:07:37,273 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-18 13:07:37,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:07:37,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-18 13:07:37,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=8985, Unknown=0, NotChecked=0, Total=9312 [2022-03-18 13:07:37,275 INFO L87 Difference]: Start difference. First operand 1791 states and 1977 transitions. Second operand has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:07:46,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:07:46,686 INFO L93 Difference]: Finished difference Result 1806 states and 1992 transitions. [2022-03-18 13:07:46,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-18 13:07:46,686 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2022-03-18 13:07:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:07:46,697 INFO L225 Difference]: With dead ends: 1806 [2022-03-18 13:07:46,697 INFO L226 Difference]: Without dead ends: 1794 [2022-03-18 13:07:46,715 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3635 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1330, Invalid=23162, Unknown=0, NotChecked=0, Total=24492 [2022-03-18 13:07:46,716 INFO L912 BasicCegarLoop]: 168 mSDtfsCounter, 2740 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 12639 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2769 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 12900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 12639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:07:46,716 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2769 Valid, 430 Invalid, 12900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 12639 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-18 13:07:46,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-03-18 13:07:47,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1792. [2022-03-18 13:07:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1588 states have (on average 1.1120906801007557) internal successors, (1766), 1718 states have internal predecessors, (1766), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (135), 68 states have call predecessors, (135), 68 states have call successors, (135) [2022-03-18 13:07:47,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 1971 transitions. [2022-03-18 13:07:47,730 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 1971 transitions. Word has length 64 [2022-03-18 13:07:47,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:07:47,730 INFO L478 AbstractCegarLoop]: Abstraction has 1792 states and 1971 transitions. [2022-03-18 13:07:47,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:07:47,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 1971 transitions. [2022-03-18 13:07:47,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 13:07:47,750 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:07:47,750 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:07:47,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-18 13:07:47,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-18 13:07:47,968 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:07:47,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:07:47,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1431947726, now seen corresponding path program 125 times [2022-03-18 13:07:47,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:07:47,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329957683] [2022-03-18 13:07:47,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:07:47,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:07:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:47,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:07:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:47,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:07:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:48,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-18 13:07:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-18 13:07:48,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:07:48,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329957683] [2022-03-18 13:07:48,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329957683] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:07:48,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803134238] [2022-03-18 13:07:48,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:07:48,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:07:48,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:07:48,098 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:07:48,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-18 13:07:48,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-18 13:07:48,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:07:48,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 13:07:48,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:07:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-18 13:07:48,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:07:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-18 13:07:48,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803134238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:07:48,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:07:48,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 28 [2022-03-18 13:07:48,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997444537] [2022-03-18 13:07:48,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:07:48,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 13:07:48,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:07:48,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 13:07:48,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2022-03-18 13:07:48,509 INFO L87 Difference]: Start difference. First operand 1792 states and 1971 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:07:50,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:07:50,157 INFO L93 Difference]: Finished difference Result 2699 states and 2926 transitions. [2022-03-18 13:07:50,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 13:07:50,158 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 64 [2022-03-18 13:07:50,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:07:50,193 INFO L225 Difference]: With dead ends: 2699 [2022-03-18 13:07:50,193 INFO L226 Difference]: Without dead ends: 1795 [2022-03-18 13:07:50,220 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1609, Invalid=3647, Unknown=0, NotChecked=0, Total=5256 [2022-03-18 13:07:50,221 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 109 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:07:50,221 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 102 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 13:07:50,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2022-03-18 13:07:51,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1787. [2022-03-18 13:07:51,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1589 states have (on average 1.1095028319697924) internal successors, (1763), 1715 states have internal predecessors, (1763), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (129), 66 states have call predecessors, (129), 66 states have call successors, (129) [2022-03-18 13:07:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 1960 transitions. [2022-03-18 13:07:51,244 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 1960 transitions. Word has length 64 [2022-03-18 13:07:51,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:07:51,244 INFO L478 AbstractCegarLoop]: Abstraction has 1787 states and 1960 transitions. [2022-03-18 13:07:51,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:07:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 1960 transitions. [2022-03-18 13:07:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 13:07:51,268 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:07:51,269 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:07:51,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-18 13:07:51,484 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-18 13:07:51,484 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:07:51,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:07:51,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1759884717, now seen corresponding path program 126 times [2022-03-18 13:07:51,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:07:51,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812894354] [2022-03-18 13:07:51,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:07:51,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:07:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:51,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:07:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:51,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:07:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:51,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 13:07:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-18 13:07:51,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:07:51,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812894354] [2022-03-18 13:07:51,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812894354] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:07:51,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976326857] [2022-03-18 13:07:51,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:07:51,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:07:51,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:07:51,613 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:07:51,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-18 13:07:51,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 13:07:51,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:07:51,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 13:07:51,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:07:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-18 13:07:52,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:07:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-18 13:07:52,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976326857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:07:52,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:07:52,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 28 [2022-03-18 13:07:52,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547220449] [2022-03-18 13:07:52,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:07:52,146 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 13:07:52,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:07:52,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 13:07:52,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2022-03-18 13:07:52,146 INFO L87 Difference]: Start difference. First operand 1787 states and 1960 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:07:53,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:07:53,822 INFO L93 Difference]: Finished difference Result 1853 states and 2040 transitions. [2022-03-18 13:07:53,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 13:07:53,822 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 64 [2022-03-18 13:07:53,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:07:53,832 INFO L225 Difference]: With dead ends: 1853 [2022-03-18 13:07:53,832 INFO L226 Difference]: Without dead ends: 1802 [2022-03-18 13:07:53,852 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1609, Invalid=3647, Unknown=0, NotChecked=0, Total=5256 [2022-03-18 13:07:53,853 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 184 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:07:53,853 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 83 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 13:07:53,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-03-18 13:07:54,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1802. [2022-03-18 13:07:54,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1604 states have (on average 1.1084788029925188) internal successors, (1778), 1730 states have internal predecessors, (1778), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (129), 66 states have call predecessors, (129), 66 states have call successors, (129) [2022-03-18 13:07:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 1975 transitions. [2022-03-18 13:07:54,846 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 1975 transitions. Word has length 64 [2022-03-18 13:07:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:07:54,847 INFO L478 AbstractCegarLoop]: Abstraction has 1802 states and 1975 transitions. [2022-03-18 13:07:54,847 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:07:54,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 1975 transitions. [2022-03-18 13:07:54,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 13:07:54,866 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:07:54,866 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:07:54,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-03-18 13:07:55,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-18 13:07:55,084 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:07:55,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:07:55,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1457584397, now seen corresponding path program 127 times [2022-03-18 13:07:55,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:07:55,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190003164] [2022-03-18 13:07:55,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:07:55,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:07:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:55,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:07:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:55,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:07:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:55,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 13:07:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:07:55,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:07:55,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190003164] [2022-03-18 13:07:55,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190003164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:07:55,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276746772] [2022-03-18 13:07:55,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:07:55,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:07:55,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:07:55,977 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:07:55,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-18 13:07:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:07:56,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-18 13:07:56,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:07:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:07:56,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:07:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:07:56,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276746772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:07:56,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:07:56,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 53 [2022-03-18 13:07:56,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781722684] [2022-03-18 13:07:56,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:07:56,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 13:07:56,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:07:56,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 13:07:56,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2643, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 13:07:56,903 INFO L87 Difference]: Start difference. First operand 1802 states and 1975 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:08:01,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:08:01,174 INFO L93 Difference]: Finished difference Result 1980 states and 2172 transitions. [2022-03-18 13:08:01,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 13:08:01,174 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-03-18 13:08:01,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:08:01,190 INFO L225 Difference]: With dead ends: 1980 [2022-03-18 13:08:01,190 INFO L226 Difference]: Without dead ends: 1974 [2022-03-18 13:08:01,210 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=325, Invalid=9181, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 13:08:01,211 INFO L912 BasicCegarLoop]: 169 mSDtfsCounter, 375 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 12265 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 12333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 12265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:08:01,211 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 406 Invalid, 12333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 12265 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-18 13:08:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2022-03-18 13:08:02,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1818. [2022-03-18 13:08:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1617 states have (on average 1.1088435374149659) internal successors, (1793), 1745 states have internal predecessors, (1793), 69 states have call successors, (69), 5 states have call predecessors, (69), 131 states have return successors, (132), 67 states have call predecessors, (132), 67 states have call successors, (132) [2022-03-18 13:08:02,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 1994 transitions. [2022-03-18 13:08:02,276 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 1994 transitions. Word has length 65 [2022-03-18 13:08:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:08:02,276 INFO L478 AbstractCegarLoop]: Abstraction has 1818 states and 1994 transitions. [2022-03-18 13:08:02,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:08:02,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 1994 transitions. [2022-03-18 13:08:02,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 13:08:02,297 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:08:02,297 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:08:02,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-18 13:08:02,514 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-18 13:08:02,515 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:08:02,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:08:02,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1334309325, now seen corresponding path program 128 times [2022-03-18 13:08:02,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:08:02,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685409132] [2022-03-18 13:08:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:08:02,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:08:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:02,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:08:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:02,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:08:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:02,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 13:08:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:08:03,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:08:03,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685409132] [2022-03-18 13:08:03,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685409132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:08:03,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024112697] [2022-03-18 13:08:03,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:08:03,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:08:03,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:08:03,023 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:08:03,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-18 13:08:03,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:08:03,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:08:03,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-18 13:08:03,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:08:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:08:03,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:08:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:08:03,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024112697] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:08:03,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:08:03,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 53 [2022-03-18 13:08:03,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042046608] [2022-03-18 13:08:03,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:08:03,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 13:08:03,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:08:03,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 13:08:03,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2639, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 13:08:03,801 INFO L87 Difference]: Start difference. First operand 1818 states and 1994 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:08:08,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:08:08,517 INFO L93 Difference]: Finished difference Result 1824 states and 1999 transitions. [2022-03-18 13:08:08,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 13:08:08,517 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-03-18 13:08:08,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:08:08,527 INFO L225 Difference]: With dead ends: 1824 [2022-03-18 13:08:08,527 INFO L226 Difference]: Without dead ends: 1802 [2022-03-18 13:08:08,550 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=327, Invalid=8793, Unknown=0, NotChecked=0, Total=9120 [2022-03-18 13:08:08,550 INFO L912 BasicCegarLoop]: 154 mSDtfsCounter, 290 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 10682 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 10729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 10682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:08:08,550 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 381 Invalid, 10729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 10682 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-18 13:08:08,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-03-18 13:08:09,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1802. [2022-03-18 13:08:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1604 states have (on average 1.1084788029925188) internal successors, (1778), 1730 states have internal predecessors, (1778), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (130), 66 states have call predecessors, (130), 66 states have call successors, (130) [2022-03-18 13:08:09,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 1976 transitions. [2022-03-18 13:08:09,536 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 1976 transitions. Word has length 65 [2022-03-18 13:08:09,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:08:09,536 INFO L478 AbstractCegarLoop]: Abstraction has 1802 states and 1976 transitions. [2022-03-18 13:08:09,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:08:09,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 1976 transitions. [2022-03-18 13:08:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 13:08:09,553 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:08:09,553 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:08:09,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-18 13:08:09,756 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-03-18 13:08:09,757 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:08:09,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:08:09,757 INFO L85 PathProgramCache]: Analyzing trace with hash -848414451, now seen corresponding path program 129 times [2022-03-18 13:08:09,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:08:09,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393218730] [2022-03-18 13:08:09,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:08:09,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:08:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:09,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:08:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:09,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:08:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:10,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 13:08:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:08:10,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:08:10,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393218730] [2022-03-18 13:08:10,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393218730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:08:10,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482773602] [2022-03-18 13:08:10,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:08:10,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:08:10,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:08:10,353 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:08:10,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-18 13:08:10,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-18 13:08:10,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:08:10,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 13:08:10,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:08:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:08:11,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:08:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:08:11,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482773602] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:08:11,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:08:11,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 53 [2022-03-18 13:08:11,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385966267] [2022-03-18 13:08:11,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:08:11,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 13:08:11,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:08:11,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 13:08:11,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2635, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 13:08:11,263 INFO L87 Difference]: Start difference. First operand 1802 states and 1976 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:08:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:08:14,922 INFO L93 Difference]: Finished difference Result 1808 states and 1981 transitions. [2022-03-18 13:08:14,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 13:08:14,922 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-03-18 13:08:14,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:08:14,931 INFO L225 Difference]: With dead ends: 1808 [2022-03-18 13:08:14,932 INFO L226 Difference]: Without dead ends: 1784 [2022-03-18 13:08:14,949 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=329, Invalid=8413, Unknown=0, NotChecked=0, Total=8742 [2022-03-18 13:08:14,950 INFO L912 BasicCegarLoop]: 134 mSDtfsCounter, 251 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 9339 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 9385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 9339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:08:14,950 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 361 Invalid, 9385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 9339 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-18 13:08:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2022-03-18 13:08:15,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1784. [2022-03-18 13:08:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1589 states have (on average 1.1082441787287602) internal successors, (1761), 1713 states have internal predecessors, (1761), 67 states have call successors, (67), 5 states have call predecessors, (67), 127 states have return successors, (128), 65 states have call predecessors, (128), 65 states have call successors, (128) [2022-03-18 13:08:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 1956 transitions. [2022-03-18 13:08:15,966 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 1956 transitions. Word has length 65 [2022-03-18 13:08:15,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:08:15,966 INFO L478 AbstractCegarLoop]: Abstraction has 1784 states and 1956 transitions. [2022-03-18 13:08:15,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:08:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 1956 transitions. [2022-03-18 13:08:15,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 13:08:15,986 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:08:15,986 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:08:16,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-03-18 13:08:16,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-03-18 13:08:16,199 INFO L403 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:08:16,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:08:16,200 INFO L85 PathProgramCache]: Analyzing trace with hash 675131853, now seen corresponding path program 130 times [2022-03-18 13:08:16,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:08:16,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717320575] [2022-03-18 13:08:16,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:08:16,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:08:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:16,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:08:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:16,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:08:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:16,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 13:08:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:08:16,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:08:16,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717320575] [2022-03-18 13:08:16,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717320575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:08:16,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074775374] [2022-03-18 13:08:16,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:08:16,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:08:16,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:08:16,867 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:08:16,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-18 13:08:17,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:08:17,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:08:17,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-18 13:08:17,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:08:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:08:17,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:08:17,878 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:08:17,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074775374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:08:17,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:08:17,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 53 [2022-03-18 13:08:17,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774447927] [2022-03-18 13:08:17,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:08:17,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 13:08:17,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:08:17,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 13:08:17,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2631, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 13:08:17,880 INFO L87 Difference]: Start difference. First operand 1784 states and 1956 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:08:21,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:08:21,263 INFO L93 Difference]: Finished difference Result 1790 states and 1961 transitions. [2022-03-18 13:08:21,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 13:08:21,263 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-03-18 13:08:21,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:08:21,273 INFO L225 Difference]: With dead ends: 1790 [2022-03-18 13:08:21,273 INFO L226 Difference]: Without dead ends: 1764 [2022-03-18 13:08:21,292 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=331, Invalid=8041, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 13:08:21,292 INFO L912 BasicCegarLoop]: 114 mSDtfsCounter, 212 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7467 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 7511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 7467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:08:21,292 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 326 Invalid, 7511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 7467 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 13:08:21,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2022-03-18 13:08:22,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1764. [2022-03-18 13:08:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1572 states have (on average 1.1081424936386768) internal successors, (1742), 1694 states have internal predecessors, (1742), 66 states have call successors, (66), 5 states have call predecessors, (66), 125 states have return successors, (126), 64 states have call predecessors, (126), 64 states have call successors, (126) [2022-03-18 13:08:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 1934 transitions. [2022-03-18 13:08:22,327 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 1934 transitions. Word has length 65 [2022-03-18 13:08:22,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:08:22,327 INFO L478 AbstractCegarLoop]: Abstraction has 1764 states and 1934 transitions. [2022-03-18 13:08:22,327 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:08:22,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 1934 transitions. [2022-03-18 13:08:22,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 13:08:22,345 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:08:22,345 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:08:22,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-03-18 13:08:22,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:08:22,555 INFO L403 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:08:22,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:08:22,556 INFO L85 PathProgramCache]: Analyzing trace with hash -294291187, now seen corresponding path program 131 times [2022-03-18 13:08:22,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:08:22,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390422602] [2022-03-18 13:08:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:08:22,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:08:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:22,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:08:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:22,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:08:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:22,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 13:08:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:08:22,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:08:22,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390422602] [2022-03-18 13:08:22,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390422602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:08:22,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963107565] [2022-03-18 13:08:22,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:08:22,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:08:22,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:08:22,986 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:08:22,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-18 13:08:23,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-18 13:08:23,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:08:23,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 13:08:23,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:08:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:08:23,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:08:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:08:23,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963107565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:08:23,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:08:23,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 53 [2022-03-18 13:08:23,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311935208] [2022-03-18 13:08:23,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:08:23,799 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 13:08:23,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:08:23,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 13:08:23,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2627, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 13:08:23,800 INFO L87 Difference]: Start difference. First operand 1764 states and 1934 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:08:26,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:08:26,529 INFO L93 Difference]: Finished difference Result 1770 states and 1939 transitions. [2022-03-18 13:08:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 13:08:26,530 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-03-18 13:08:26,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:08:26,539 INFO L225 Difference]: With dead ends: 1770 [2022-03-18 13:08:26,539 INFO L226 Difference]: Without dead ends: 1742 [2022-03-18 13:08:26,557 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=333, Invalid=7677, Unknown=0, NotChecked=0, Total=8010 [2022-03-18 13:08:26,558 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 173 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 6073 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 6115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 6073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 13:08:26,558 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 301 Invalid, 6115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 6073 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 13:08:26,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2022-03-18 13:08:27,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1742. [2022-03-18 13:08:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1742 states, 1553 states have (on average 1.1081777205408887) internal successors, (1721), 1673 states have internal predecessors, (1721), 65 states have call successors, (65), 5 states have call predecessors, (65), 123 states have return successors, (124), 63 states have call predecessors, (124), 63 states have call successors, (124) [2022-03-18 13:08:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1742 states to 1742 states and 1910 transitions. [2022-03-18 13:08:27,581 INFO L78 Accepts]: Start accepts. Automaton has 1742 states and 1910 transitions. Word has length 65 [2022-03-18 13:08:27,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:08:27,581 INFO L478 AbstractCegarLoop]: Abstraction has 1742 states and 1910 transitions. [2022-03-18 13:08:27,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:08:27,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1742 states and 1910 transitions. [2022-03-18 13:08:27,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 13:08:27,598 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:08:27,599 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:08:27,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-03-18 13:08:27,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:08:27,811 INFO L403 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:08:27,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:08:27,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1350136269, now seen corresponding path program 132 times [2022-03-18 13:08:27,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:08:27,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442167095] [2022-03-18 13:08:27,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:08:27,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:08:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:27,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:08:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:27,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:08:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:28,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 13:08:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:08:28,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:08:28,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442167095] [2022-03-18 13:08:28,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442167095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:08:28,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922584651] [2022-03-18 13:08:28,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:08:28,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:08:28,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:08:28,385 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:08:28,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-18 13:08:28,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 13:08:28,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:08:28,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 13:08:28,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:08:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:08:29,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:08:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:08:29,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922584651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:08:29,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:08:29,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 53 [2022-03-18 13:08:29,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926364239] [2022-03-18 13:08:29,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:08:29,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 13:08:29,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:08:29,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 13:08:29,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2623, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 13:08:29,469 INFO L87 Difference]: Start difference. First operand 1742 states and 1910 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:08:32,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:08:32,235 INFO L93 Difference]: Finished difference Result 1748 states and 1915 transitions. [2022-03-18 13:08:32,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 13:08:32,235 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-03-18 13:08:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:08:32,244 INFO L225 Difference]: With dead ends: 1748 [2022-03-18 13:08:32,244 INFO L226 Difference]: Without dead ends: 1718 [2022-03-18 13:08:32,261 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=335, Invalid=7321, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 13:08:32,262 INFO L912 BasicCegarLoop]: 74 mSDtfsCounter, 135 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4300 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 4340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:08:32,262 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 256 Invalid, 4340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4300 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 13:08:32,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2022-03-18 13:08:33,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1718. [2022-03-18 13:08:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1532 states have (on average 1.108355091383812) internal successors, (1698), 1650 states have internal predecessors, (1698), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (122), 62 states have call predecessors, (122), 62 states have call successors, (122) [2022-03-18 13:08:33,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 1884 transitions. [2022-03-18 13:08:33,254 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 1884 transitions. Word has length 65 [2022-03-18 13:08:33,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:08:33,254 INFO L478 AbstractCegarLoop]: Abstraction has 1718 states and 1884 transitions. [2022-03-18 13:08:33,254 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:08:33,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 1884 transitions. [2022-03-18 13:08:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 13:08:33,271 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:08:33,271 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:08:33,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-03-18 13:08:33,488 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:08:33,488 INFO L403 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:08:33,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:08:33,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1376339699, now seen corresponding path program 133 times [2022-03-18 13:08:33,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:08:33,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853986783] [2022-03-18 13:08:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:08:33,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:08:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:33,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:08:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:33,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:08:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:33,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 13:08:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 13:08:33,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:08:33,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853986783] [2022-03-18 13:08:33,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853986783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:08:33,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603354756] [2022-03-18 13:08:33,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:08:33,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:08:33,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:08:33,989 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:08:33,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-18 13:08:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:34,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 13:08:34,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:08:34,907 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 13:08:34,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:08:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 13:08:35,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603354756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:08:35,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:08:35,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 53 [2022-03-18 13:08:35,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633687680] [2022-03-18 13:08:35,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:08:35,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 13:08:35,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:08:35,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 13:08:35,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2619, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 13:08:35,208 INFO L87 Difference]: Start difference. First operand 1718 states and 1884 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:08:37,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:08:37,768 INFO L93 Difference]: Finished difference Result 1724 states and 1889 transitions. [2022-03-18 13:08:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 13:08:37,769 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-03-18 13:08:37,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:08:37,778 INFO L225 Difference]: With dead ends: 1724 [2022-03-18 13:08:37,778 INFO L226 Difference]: Without dead ends: 1692 [2022-03-18 13:08:37,803 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=337, Invalid=6973, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 13:08:37,803 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 95 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 3593 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 3631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:08:37,803 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 256 Invalid, 3631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3593 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 13:08:37,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-03-18 13:08:38,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1692. [2022-03-18 13:08:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1509 states have (on average 1.1086812458581843) internal successors, (1673), 1625 states have internal predecessors, (1673), 63 states have call successors, (63), 5 states have call predecessors, (63), 119 states have return successors, (120), 61 states have call predecessors, (120), 61 states have call successors, (120) [2022-03-18 13:08:38,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 1856 transitions. [2022-03-18 13:08:38,822 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 1856 transitions. Word has length 65 [2022-03-18 13:08:38,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:08:38,822 INFO L478 AbstractCegarLoop]: Abstraction has 1692 states and 1856 transitions. [2022-03-18 13:08:38,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:08:38,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 1856 transitions. [2022-03-18 13:08:38,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 13:08:38,840 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:08:38,840 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:08:38,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-18 13:08:39,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:08:39,055 INFO L403 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:08:39,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:08:39,056 INFO L85 PathProgramCache]: Analyzing trace with hash 70988237, now seen corresponding path program 134 times [2022-03-18 13:08:39,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:08:39,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065549280] [2022-03-18 13:08:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:08:39,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:08:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:39,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:08:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:39,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:08:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:39,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 13:08:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 13:08:39,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:08:39,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065549280] [2022-03-18 13:08:39,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065549280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:08:39,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927779420] [2022-03-18 13:08:39,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:08:39,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:08:39,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:08:39,559 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:08:39,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-18 13:08:39,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:08:39,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:08:39,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-18 13:08:39,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:08:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 13:08:40,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:08:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 13:08:40,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927779420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:08:40,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:08:40,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 53 [2022-03-18 13:08:40,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159892721] [2022-03-18 13:08:40,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:08:40,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 13:08:40,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:08:40,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 13:08:40,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2615, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 13:08:40,874 INFO L87 Difference]: Start difference. First operand 1692 states and 1856 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:08:42,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:08:42,875 INFO L93 Difference]: Finished difference Result 1710 states and 1877 transitions. [2022-03-18 13:08:42,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 13:08:42,875 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-03-18 13:08:42,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:08:42,915 INFO L225 Difference]: With dead ends: 1710 [2022-03-18 13:08:42,915 INFO L226 Difference]: Without dead ends: 1704 [2022-03-18 13:08:42,941 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=339, Invalid=6633, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 13:08:42,941 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1872 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 13:08:42,941 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 193 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1872 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 13:08:42,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2022-03-18 13:08:43,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1702. [2022-03-18 13:08:43,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1516 states have (on average 1.1094986807387863) internal successors, (1682), 1634 states have internal predecessors, (1682), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (123), 62 states have call predecessors, (123), 62 states have call successors, (123) [2022-03-18 13:08:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 1869 transitions. [2022-03-18 13:08:43,897 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 1869 transitions. Word has length 65 [2022-03-18 13:08:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:08:43,898 INFO L478 AbstractCegarLoop]: Abstraction has 1702 states and 1869 transitions. [2022-03-18 13:08:43,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:08:43,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 1869 transitions. [2022-03-18 13:08:43,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 13:08:43,965 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:08:43,965 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:08:43,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-03-18 13:08:44,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:08:44,179 INFO L403 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:08:44,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:08:44,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1215970924, now seen corresponding path program 135 times [2022-03-18 13:08:44,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:08:44,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50851605] [2022-03-18 13:08:44,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:08:44,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:08:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:44,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:08:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:44,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:08:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:44,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 13:08:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:08:44,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:08:44,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50851605] [2022-03-18 13:08:44,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50851605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:08:44,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603740204] [2022-03-18 13:08:44,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:08:44,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:08:44,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:08:44,867 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:08:44,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-18 13:08:45,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-18 13:08:45,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:08:45,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 13:08:45,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:08:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:08:46,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:08:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:08:48,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603740204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:08:48,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:08:48,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 103 [2022-03-18 13:08:48,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146419838] [2022-03-18 13:08:48,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:08:48,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-18 13:08:48,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:08:48,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-18 13:08:48,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=10158, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 13:08:48,652 INFO L87 Difference]: Start difference. First operand 1702 states and 1869 transitions. Second operand has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:08:58,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:08:58,365 INFO L93 Difference]: Finished difference Result 1878 states and 2074 transitions. [2022-03-18 13:08:58,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-18 13:08:58,366 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-03-18 13:08:58,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:08:58,393 INFO L225 Difference]: With dead ends: 1878 [2022-03-18 13:08:58,393 INFO L226 Difference]: Without dead ends: 1864 [2022-03-18 13:08:58,414 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4114 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1466, Invalid=26256, Unknown=0, NotChecked=0, Total=27722 [2022-03-18 13:08:58,415 INFO L912 BasicCegarLoop]: 174 mSDtfsCounter, 3049 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 14660 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3054 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 14984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 14660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:08:58,415 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3054 Valid, 476 Invalid, 14984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 14660 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-18 13:08:58,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-03-18 13:08:59,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1855. [2022-03-18 13:08:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1651 states have (on average 1.1090248334342823) internal successors, (1831), 1781 states have internal predecessors, (1831), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (141), 68 states have call predecessors, (141), 68 states have call successors, (141) [2022-03-18 13:08:59,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2042 transitions. [2022-03-18 13:08:59,461 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2042 transitions. Word has length 66 [2022-03-18 13:08:59,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:08:59,461 INFO L478 AbstractCegarLoop]: Abstraction has 1855 states and 2042 transitions. [2022-03-18 13:08:59,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:08:59,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2042 transitions. [2022-03-18 13:08:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 13:08:59,478 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:08:59,478 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:08:59,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-03-18 13:08:59,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:08:59,695 INFO L403 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:08:59,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:08:59,696 INFO L85 PathProgramCache]: Analyzing trace with hash 2031107919, now seen corresponding path program 136 times [2022-03-18 13:08:59,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:08:59,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596339060] [2022-03-18 13:08:59,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:08:59,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:08:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:59,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:08:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:59,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:08:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:08:59,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 13:08:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:09:00,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:09:00,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596339060] [2022-03-18 13:09:00,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596339060] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:09:00,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450140781] [2022-03-18 13:09:00,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:09:00,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:09:00,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:09:00,236 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:09:00,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-18 13:09:00,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:09:00,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:09:00,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 13:09:00,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:09:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:09:01,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:09:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:09:02,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450140781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:09:02,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:09:02,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 103 [2022-03-18 13:09:02,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821690703] [2022-03-18 13:09:02,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:09:02,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-18 13:09:02,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:09:02,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-18 13:09:02,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=10158, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 13:09:02,936 INFO L87 Difference]: Start difference. First operand 1855 states and 2042 transitions. Second operand has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:09:13,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:09:13,088 INFO L93 Difference]: Finished difference Result 1870 states and 2057 transitions. [2022-03-18 13:09:13,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-18 13:09:13,088 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-03-18 13:09:13,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:09:13,098 INFO L225 Difference]: With dead ends: 1870 [2022-03-18 13:09:13,099 INFO L226 Difference]: Without dead ends: 1858 [2022-03-18 13:09:13,141 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4133 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1466, Invalid=26256, Unknown=0, NotChecked=0, Total=27722 [2022-03-18 13:09:13,142 INFO L912 BasicCegarLoop]: 178 mSDtfsCounter, 3019 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 15547 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3050 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 15841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 15547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-18 13:09:13,142 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3050 Valid, 490 Invalid, 15841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 15547 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-03-18 13:09:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-03-18 13:09:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1856. [2022-03-18 13:09:14,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1652 states have (on average 1.1089588377723971) internal successors, (1832), 1782 states have internal predecessors, (1832), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (134), 68 states have call predecessors, (134), 68 states have call successors, (134) [2022-03-18 13:09:14,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2036 transitions. [2022-03-18 13:09:14,257 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2036 transitions. Word has length 66 [2022-03-18 13:09:14,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:09:14,258 INFO L478 AbstractCegarLoop]: Abstraction has 1856 states and 2036 transitions. [2022-03-18 13:09:14,258 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:09:14,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2036 transitions. [2022-03-18 13:09:14,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 13:09:14,278 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:09:14,278 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:09:14,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-03-18 13:09:14,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-03-18 13:09:14,487 INFO L403 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:09:14,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:09:14,488 INFO L85 PathProgramCache]: Analyzing trace with hash -745195091, now seen corresponding path program 137 times [2022-03-18 13:09:14,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:09:14,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096987883] [2022-03-18 13:09:14,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:09:14,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:09:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:14,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:09:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:14,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:09:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:14,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 13:09:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-18 13:09:14,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:09:14,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096987883] [2022-03-18 13:09:14,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096987883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:09:14,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640010707] [2022-03-18 13:09:14,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:09:14,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:09:14,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:09:14,646 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:09:14,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-18 13:09:14,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-18 13:09:14,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:09:14,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 13:09:14,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:09:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-18 13:09:15,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:09:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-18 13:09:15,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640010707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:09:15,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:09:15,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 30 [2022-03-18 13:09:15,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223483699] [2022-03-18 13:09:15,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:09:15,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 13:09:15,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:09:15,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 13:09:15,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-03-18 13:09:15,128 INFO L87 Difference]: Start difference. First operand 1856 states and 2036 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:09:17,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:09:17,379 INFO L93 Difference]: Finished difference Result 2152 states and 2381 transitions. [2022-03-18 13:09:17,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-18 13:09:17,380 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 66 [2022-03-18 13:09:17,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:09:17,392 INFO L225 Difference]: With dead ends: 2152 [2022-03-18 13:09:17,393 INFO L226 Difference]: Without dead ends: 2082 [2022-03-18 13:09:17,486 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1673, Invalid=5299, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 13:09:17,486 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 215 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 13:09:17,486 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 92 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 13:09:17,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2022-03-18 13:09:18,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 2034. [2022-03-18 13:09:18,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 1830 states have (on average 1.1076502732240436) internal successors, (2027), 1960 states have internal predecessors, (2027), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (134), 68 states have call predecessors, (134), 68 states have call successors, (134) [2022-03-18 13:09:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 2231 transitions. [2022-03-18 13:09:18,707 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 2231 transitions. Word has length 66 [2022-03-18 13:09:18,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:09:18,707 INFO L478 AbstractCegarLoop]: Abstraction has 2034 states and 2231 transitions. [2022-03-18 13:09:18,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:09:18,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 2231 transitions. [2022-03-18 13:09:18,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 13:09:18,734 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:09:18,734 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:09:18,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-18 13:09:18,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-03-18 13:09:18,951 INFO L403 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:09:18,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:09:18,951 INFO L85 PathProgramCache]: Analyzing trace with hash -582637166, now seen corresponding path program 138 times [2022-03-18 13:09:18,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:09:18,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503007674] [2022-03-18 13:09:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:09:18,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:09:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:18,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:09:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:18,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:09:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:19,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 13:09:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-18 13:09:19,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:09:19,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503007674] [2022-03-18 13:09:19,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503007674] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:09:19,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913958475] [2022-03-18 13:09:19,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:09:19,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:09:19,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:09:19,107 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:09:19,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-18 13:09:19,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-18 13:09:19,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:09:19,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 13:09:19,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:09:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-18 13:09:19,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:09:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-18 13:09:19,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913958475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:09:19,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:09:19,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 30 [2022-03-18 13:09:19,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473563483] [2022-03-18 13:09:19,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:09:19,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 13:09:19,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:09:19,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 13:09:19,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-03-18 13:09:19,573 INFO L87 Difference]: Start difference. First operand 2034 states and 2231 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:09:21,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:09:21,783 INFO L93 Difference]: Finished difference Result 3395 states and 3698 transitions. [2022-03-18 13:09:21,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-18 13:09:21,783 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 66 [2022-03-18 13:09:21,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:09:21,891 INFO L225 Difference]: With dead ends: 3395 [2022-03-18 13:09:21,891 INFO L226 Difference]: Without dead ends: 2260 [2022-03-18 13:09:21,975 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1673, Invalid=5299, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 13:09:21,975 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 243 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:09:21,975 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 107 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 13:09:21,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-03-18 13:09:23,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2212. [2022-03-18 13:09:23,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2008 states have (on average 1.1065737051792828) internal successors, (2222), 2138 states have internal predecessors, (2222), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (134), 68 states have call predecessors, (134), 68 states have call successors, (134) [2022-03-18 13:09:23,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2426 transitions. [2022-03-18 13:09:23,368 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2426 transitions. Word has length 66 [2022-03-18 13:09:23,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:09:23,368 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2426 transitions. [2022-03-18 13:09:23,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:09:23,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2426 transitions. [2022-03-18 13:09:23,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 13:09:23,395 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:09:23,395 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:09:23,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-03-18 13:09:23,612 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-18 13:09:23,612 INFO L403 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:09:23,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:09:23,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1815330922, now seen corresponding path program 139 times [2022-03-18 13:09:23,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:09:23,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218606632] [2022-03-18 13:09:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:09:23,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:09:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:23,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:09:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:23,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:09:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:23,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 13:09:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:09:24,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:09:24,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218606632] [2022-03-18 13:09:24,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218606632] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:09:24,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574219222] [2022-03-18 13:09:24,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:09:24,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:09:24,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:09:24,525 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:09:24,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-18 13:09:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:24,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-18 13:09:24,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:09:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:09:25,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:09:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:09:25,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574219222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:09:25,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:09:25,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 55 [2022-03-18 13:09:25,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088308989] [2022-03-18 13:09:25,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:09:25,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 13:09:25,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:09:25,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 13:09:25,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2853, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 13:09:25,442 INFO L87 Difference]: Start difference. First operand 2212 states and 2426 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:09:31,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:09:31,159 INFO L93 Difference]: Finished difference Result 2412 states and 2647 transitions. [2022-03-18 13:09:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-18 13:09:31,160 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-03-18 13:09:31,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:09:31,181 INFO L225 Difference]: With dead ends: 2412 [2022-03-18 13:09:31,181 INFO L226 Difference]: Without dead ends: 2406 [2022-03-18 13:09:31,208 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 128 SyntacticMatches, 5 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=337, Invalid=9965, Unknown=0, NotChecked=0, Total=10302 [2022-03-18 13:09:31,208 INFO L912 BasicCegarLoop]: 181 mSDtfsCounter, 400 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 12823 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 12893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 12823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-18 13:09:31,208 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 413 Invalid, 12893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 12823 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-18 13:09:31,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2022-03-18 13:09:32,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2228. [2022-03-18 13:09:32,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2021 states have (on average 1.106877783275606) internal successors, (2237), 2153 states have internal predecessors, (2237), 71 states have call successors, (71), 5 states have call predecessors, (71), 135 states have return successors, (137), 69 states have call predecessors, (137), 69 states have call successors, (137) [2022-03-18 13:09:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 2445 transitions. [2022-03-18 13:09:32,636 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 2445 transitions. Word has length 67 [2022-03-18 13:09:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:09:32,636 INFO L478 AbstractCegarLoop]: Abstraction has 2228 states and 2445 transitions. [2022-03-18 13:09:32,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:09:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 2445 transitions. [2022-03-18 13:09:32,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 13:09:32,662 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:09:32,662 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:09:32,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-03-18 13:09:32,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-03-18 13:09:32,879 INFO L403 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:09:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:09:32,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1329996490, now seen corresponding path program 140 times [2022-03-18 13:09:32,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:09:32,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499930070] [2022-03-18 13:09:32,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:09:32,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:09:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:32,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:09:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:32,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:09:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:33,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 13:09:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:09:33,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:09:33,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499930070] [2022-03-18 13:09:33,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499930070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:09:33,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028409915] [2022-03-18 13:09:33,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:09:33,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:09:33,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:09:33,757 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:09:33,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-18 13:09:33,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:09:33,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:09:33,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-18 13:09:33,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:09:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:09:34,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:09:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:09:34,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028409915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:09:34,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:09:34,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 55 [2022-03-18 13:09:34,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854369662] [2022-03-18 13:09:34,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:09:34,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 13:09:34,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:09:34,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 13:09:34,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2849, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 13:09:34,840 INFO L87 Difference]: Start difference. First operand 2228 states and 2445 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:09:40,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:09:40,018 INFO L93 Difference]: Finished difference Result 2234 states and 2450 transitions. [2022-03-18 13:09:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 13:09:40,018 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-03-18 13:09:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:09:40,032 INFO L225 Difference]: With dead ends: 2234 [2022-03-18 13:09:40,032 INFO L226 Difference]: Without dead ends: 2212 [2022-03-18 13:09:40,058 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=339, Invalid=9561, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 13:09:40,058 INFO L912 BasicCegarLoop]: 161 mSDtfsCounter, 314 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 11957 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 12008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 11957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:09:40,058 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 403 Invalid, 12008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 11957 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-18 13:09:40,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2022-03-18 13:09:41,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 2212. [2022-03-18 13:09:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2008 states have (on average 1.1065737051792828) internal successors, (2222), 2138 states have internal predecessors, (2222), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (135), 68 states have call predecessors, (135), 68 states have call successors, (135) [2022-03-18 13:09:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2427 transitions. [2022-03-18 13:09:41,591 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2427 transitions. Word has length 67 [2022-03-18 13:09:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:09:41,591 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2427 transitions. [2022-03-18 13:09:41,592 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:09:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2427 transitions. [2022-03-18 13:09:41,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 13:09:41,617 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:09:41,617 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:09:41,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-18 13:09:41,821 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:09:41,821 INFO L403 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:09:41,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:09:41,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1769464598, now seen corresponding path program 141 times [2022-03-18 13:09:41,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:09:41,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743737429] [2022-03-18 13:09:41,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:09:41,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:09:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:41,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:09:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:41,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:09:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:42,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 13:09:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:09:42,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:09:42,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743737429] [2022-03-18 13:09:42,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743737429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:09:42,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926964026] [2022-03-18 13:09:42,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:09:42,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:09:42,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:09:42,654 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:09:42,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-18 13:09:42,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-18 13:09:42,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:09:42,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-18 13:09:42,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:09:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:09:43,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:09:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:09:43,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926964026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:09:43,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:09:43,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 55 [2022-03-18 13:09:43,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521091015] [2022-03-18 13:09:43,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:09:43,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 13:09:43,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:09:43,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 13:09:43,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2845, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 13:09:43,567 INFO L87 Difference]: Start difference. First operand 2212 states and 2427 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:09:47,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:09:47,829 INFO L93 Difference]: Finished difference Result 2218 states and 2432 transitions. [2022-03-18 13:09:47,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 13:09:47,830 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-03-18 13:09:47,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:09:47,842 INFO L225 Difference]: With dead ends: 2218 [2022-03-18 13:09:47,842 INFO L226 Difference]: Without dead ends: 2194 [2022-03-18 13:09:47,866 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=341, Invalid=9165, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 13:09:47,866 INFO L912 BasicCegarLoop]: 141 mSDtfsCounter, 275 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 9663 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 9713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 9663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:09:47,866 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 363 Invalid, 9713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 9663 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 13:09:47,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2022-03-18 13:09:49,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 2194. [2022-03-18 13:09:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 1993 states have (on average 1.1063723030607124) internal successors, (2205), 2121 states have internal predecessors, (2205), 69 states have call successors, (69), 5 states have call predecessors, (69), 131 states have return successors, (133), 67 states have call predecessors, (133), 67 states have call successors, (133) [2022-03-18 13:09:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 2407 transitions. [2022-03-18 13:09:49,213 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 2407 transitions. Word has length 67 [2022-03-18 13:09:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:09:49,213 INFO L478 AbstractCegarLoop]: Abstraction has 2194 states and 2407 transitions. [2022-03-18 13:09:49,213 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:09:49,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 2407 transitions. [2022-03-18 13:09:49,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 13:09:49,238 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:09:49,238 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:09:49,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-03-18 13:09:49,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:09:49,451 INFO L403 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:09:49,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:09:49,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1039746634, now seen corresponding path program 142 times [2022-03-18 13:09:49,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:09:49,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495246529] [2022-03-18 13:09:49,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:09:49,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:09:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:49,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:09:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:49,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:09:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:49,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 13:09:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:09:49,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:09:49,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495246529] [2022-03-18 13:09:49,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495246529] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:09:49,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983992405] [2022-03-18 13:09:49,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:09:49,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:09:49,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:09:49,995 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:09:49,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-18 13:09:50,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:09:50,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:09:50,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 13:09:50,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:09:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:09:50,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:09:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:09:50,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983992405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:09:50,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:09:50,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 55 [2022-03-18 13:09:50,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174610917] [2022-03-18 13:09:50,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:09:50,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 13:09:50,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:09:50,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 13:09:50,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2841, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 13:09:50,938 INFO L87 Difference]: Start difference. First operand 2194 states and 2407 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:09:54,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:09:54,946 INFO L93 Difference]: Finished difference Result 2200 states and 2412 transitions. [2022-03-18 13:09:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 13:09:54,946 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-03-18 13:09:54,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:09:54,959 INFO L225 Difference]: With dead ends: 2200 [2022-03-18 13:09:54,959 INFO L226 Difference]: Without dead ends: 2174 [2022-03-18 13:09:55,033 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=343, Invalid=8777, Unknown=0, NotChecked=0, Total=9120 [2022-03-18 13:09:55,033 INFO L912 BasicCegarLoop]: 121 mSDtfsCounter, 236 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 8178 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 8226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 8178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:09:55,033 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 338 Invalid, 8226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 8178 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-18 13:09:55,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2022-03-18 13:09:56,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 2174. [2022-03-18 13:09:56,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 1976 states have (on average 1.1062753036437247) internal successors, (2186), 2102 states have internal predecessors, (2186), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (131), 66 states have call predecessors, (131), 66 states have call successors, (131) [2022-03-18 13:09:56,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 2385 transitions. [2022-03-18 13:09:56,453 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 2385 transitions. Word has length 67 [2022-03-18 13:09:56,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:09:56,453 INFO L478 AbstractCegarLoop]: Abstraction has 2174 states and 2385 transitions. [2022-03-18 13:09:56,453 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:09:56,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 2385 transitions. [2022-03-18 13:09:56,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 13:09:56,477 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:09:56,477 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:09:56,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-03-18 13:09:56,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:09:56,686 INFO L403 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:09:56,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:09:56,686 INFO L85 PathProgramCache]: Analyzing trace with hash -125863574, now seen corresponding path program 143 times [2022-03-18 13:09:56,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:09:56,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586414667] [2022-03-18 13:09:56,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:09:56,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:09:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:56,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:09:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:56,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:09:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:56,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 13:09:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:09:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:09:57,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:09:57,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586414667] [2022-03-18 13:09:57,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586414667] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:09:57,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369041403] [2022-03-18 13:09:57,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:09:57,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:09:57,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:09:57,407 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:09:57,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-18 13:09:57,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-18 13:09:57,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:09:57,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-18 13:09:57,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:09:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:09:58,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:09:58,654 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:09:58,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369041403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:09:58,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:09:58,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 55 [2022-03-18 13:09:58,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613626102] [2022-03-18 13:09:58,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:09:58,655 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 13:09:58,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:09:58,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 13:09:58,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2837, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 13:09:58,656 INFO L87 Difference]: Start difference. First operand 2174 states and 2385 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:10:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:10:02,490 INFO L93 Difference]: Finished difference Result 2180 states and 2390 transitions. [2022-03-18 13:10:02,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 13:10:02,491 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-03-18 13:10:02,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:10:02,503 INFO L225 Difference]: With dead ends: 2180 [2022-03-18 13:10:02,503 INFO L226 Difference]: Without dead ends: 2152 [2022-03-18 13:10:02,528 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=345, Invalid=8397, Unknown=0, NotChecked=0, Total=8742 [2022-03-18 13:10:02,528 INFO L912 BasicCegarLoop]: 101 mSDtfsCounter, 198 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 6573 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 6619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 6573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:10:02,528 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 308 Invalid, 6619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 6573 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 13:10:02,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2022-03-18 13:10:03,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 2152. [2022-03-18 13:10:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 1957 states have (on average 1.1062851303014818) internal successors, (2165), 2081 states have internal predecessors, (2165), 67 states have call successors, (67), 5 states have call predecessors, (67), 127 states have return successors, (129), 65 states have call predecessors, (129), 65 states have call successors, (129) [2022-03-18 13:10:03,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 2361 transitions. [2022-03-18 13:10:03,902 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 2361 transitions. Word has length 67 [2022-03-18 13:10:03,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:10:03,902 INFO L478 AbstractCegarLoop]: Abstraction has 2152 states and 2361 transitions. [2022-03-18 13:10:03,903 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:10:03,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 2361 transitions. [2022-03-18 13:10:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 13:10:03,926 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:10:03,926 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:10:03,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-03-18 13:10:04,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:10:04,130 INFO L403 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:10:04,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:10:04,130 INFO L85 PathProgramCache]: Analyzing trace with hash 933587402, now seen corresponding path program 144 times [2022-03-18 13:10:04,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:10:04,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641490864] [2022-03-18 13:10:04,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:10:04,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:10:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:04,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:10:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:04,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:10:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:04,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 13:10:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:10:04,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:10:04,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641490864] [2022-03-18 13:10:04,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641490864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:10:04,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625857107] [2022-03-18 13:10:04,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:10:04,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:10:04,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:10:04,796 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:10:04,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-18 13:10:04,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 13:10:04,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:10:04,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 13:10:04,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:10:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:10:05,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:10:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:10:05,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625857107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:10:05,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:10:05,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 55 [2022-03-18 13:10:05,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789043558] [2022-03-18 13:10:05,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:10:05,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 13:10:05,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:10:05,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 13:10:05,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2833, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 13:10:05,966 INFO L87 Difference]: Start difference. First operand 2152 states and 2361 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:10:09,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:10:09,338 INFO L93 Difference]: Finished difference Result 2158 states and 2366 transitions. [2022-03-18 13:10:09,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 13:10:09,338 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-03-18 13:10:09,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:10:09,349 INFO L225 Difference]: With dead ends: 2158 [2022-03-18 13:10:09,349 INFO L226 Difference]: Without dead ends: 2128 [2022-03-18 13:10:09,372 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=347, Invalid=8025, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 13:10:09,372 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 159 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5466 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 5510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:10:09,372 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 293 Invalid, 5510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5466 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 13:10:09,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2022-03-18 13:10:10,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 2128. [2022-03-18 13:10:10,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 1936 states have (on average 1.1064049586776858) internal successors, (2142), 2058 states have internal predecessors, (2142), 66 states have call successors, (66), 5 states have call predecessors, (66), 125 states have return successors, (127), 64 states have call predecessors, (127), 64 states have call successors, (127) [2022-03-18 13:10:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 2335 transitions. [2022-03-18 13:10:10,717 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 2335 transitions. Word has length 67 [2022-03-18 13:10:10,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:10:10,717 INFO L478 AbstractCegarLoop]: Abstraction has 2128 states and 2335 transitions. [2022-03-18 13:10:10,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:10:10,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 2335 transitions. [2022-03-18 13:10:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 13:10:10,740 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:10:10,741 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:10:10,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-03-18 13:10:10,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:10:10,959 INFO L403 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:10:10,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:10:10,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1461594646, now seen corresponding path program 145 times [2022-03-18 13:10:10,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:10:10,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739737205] [2022-03-18 13:10:10,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:10:10,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:10:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:11,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:10:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:11,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:10:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:11,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 13:10:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 13:10:11,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:10:11,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739737205] [2022-03-18 13:10:11,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739737205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:10:11,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127330288] [2022-03-18 13:10:11,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:10:11,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:10:11,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:10:11,491 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:10:11,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-18 13:10:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:11,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 13:10:11,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:10:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 13:10:12,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:10:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 13:10:12,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127330288] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:10:12,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:10:12,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 55 [2022-03-18 13:10:12,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304592913] [2022-03-18 13:10:12,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:10:12,664 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 13:10:12,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:10:12,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 13:10:12,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2829, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 13:10:12,667 INFO L87 Difference]: Start difference. First operand 2128 states and 2335 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:10:15,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:10:15,405 INFO L93 Difference]: Finished difference Result 2134 states and 2340 transitions. [2022-03-18 13:10:15,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 13:10:15,405 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-03-18 13:10:15,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:10:15,415 INFO L225 Difference]: With dead ends: 2134 [2022-03-18 13:10:15,416 INFO L226 Difference]: Without dead ends: 2102 [2022-03-18 13:10:15,436 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=349, Invalid=7661, Unknown=0, NotChecked=0, Total=8010 [2022-03-18 13:10:15,437 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 121 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 3870 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 3914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 13:10:15,437 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 255 Invalid, 3914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3870 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 13:10:15,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2022-03-18 13:10:16,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 2102. [2022-03-18 13:10:16,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 1913 states have (on average 1.1066387872451646) internal successors, (2117), 2033 states have internal predecessors, (2117), 65 states have call successors, (65), 5 states have call predecessors, (65), 123 states have return successors, (125), 63 states have call predecessors, (125), 63 states have call successors, (125) [2022-03-18 13:10:16,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 2307 transitions. [2022-03-18 13:10:16,798 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 2307 transitions. Word has length 67 [2022-03-18 13:10:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:10:16,798 INFO L478 AbstractCegarLoop]: Abstraction has 2102 states and 2307 transitions. [2022-03-18 13:10:16,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:10:16,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 2307 transitions. [2022-03-18 13:10:16,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 13:10:16,832 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:10:16,832 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:10:16,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-03-18 13:10:17,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:10:17,047 INFO L403 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:10:17,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:10:17,048 INFO L85 PathProgramCache]: Analyzing trace with hash 528374587, now seen corresponding path program 146 times [2022-03-18 13:10:17,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:10:17,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941691063] [2022-03-18 13:10:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:10:17,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:10:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:17,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:10:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:17,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:10:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:17,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 13:10:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-18 13:10:17,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:10:17,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941691063] [2022-03-18 13:10:17,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941691063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:10:17,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608604951] [2022-03-18 13:10:17,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:10:17,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:10:17,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:10:17,406 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:10:17,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-18 13:10:17,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:10:17,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:10:17,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 13:10:17,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:10:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-03-18 13:10:18,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:10:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-03-18 13:10:18,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608604951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:10:18,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:10:18,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 63 [2022-03-18 13:10:18,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169106608] [2022-03-18 13:10:18,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:10:18,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-18 13:10:18,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:10:18,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-18 13:10:18,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3680, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 13:10:18,868 INFO L87 Difference]: Start difference. First operand 2102 states and 2307 transitions. Second operand has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:10:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:10:23,068 INFO L93 Difference]: Finished difference Result 2238 states and 2473 transitions. [2022-03-18 13:10:23,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 13:10:23,068 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-03-18 13:10:23,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:10:23,166 INFO L225 Difference]: With dead ends: 2238 [2022-03-18 13:10:23,166 INFO L226 Difference]: Without dead ends: 2217 [2022-03-18 13:10:23,194 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=677, Invalid=9025, Unknown=0, NotChecked=0, Total=9702 [2022-03-18 13:10:23,194 INFO L912 BasicCegarLoop]: 119 mSDtfsCounter, 1316 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 5915 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 6042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 5915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 13:10:23,194 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1320 Valid, 286 Invalid, 6042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 5915 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 13:10:23,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2022-03-18 13:10:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 2212. [2022-03-18 13:10:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 1978 states have (on average 1.10262891809909) internal successors, (2181), 2128 states have internal predecessors, (2181), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (170), 78 states have call predecessors, (170), 78 states have call successors, (170) [2022-03-18 13:10:24,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2431 transitions. [2022-03-18 13:10:24,558 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2431 transitions. Word has length 67 [2022-03-18 13:10:24,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:10:24,559 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2431 transitions. [2022-03-18 13:10:24,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:10:24,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2431 transitions. [2022-03-18 13:10:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 13:10:24,584 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:10:24,584 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:10:24,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-03-18 13:10:24,801 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-03-18 13:10:24,801 INFO L403 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:10:24,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:10:24,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1568836938, now seen corresponding path program 147 times [2022-03-18 13:10:24,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:10:24,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648027047] [2022-03-18 13:10:24,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:10:24,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:10:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:24,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:10:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:24,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:10:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:25,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 13:10:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 13:10:25,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:10:25,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648027047] [2022-03-18 13:10:25,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648027047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:10:25,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828192490] [2022-03-18 13:10:25,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:10:25,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:10:25,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:10:25,298 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:10:25,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-18 13:10:25,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-18 13:10:25,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:10:25,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 13:10:25,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:10:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 13:10:26,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:10:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 13:10:26,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828192490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:10:26,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:10:26,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 55 [2022-03-18 13:10:26,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452769248] [2022-03-18 13:10:26,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:10:26,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 13:10:26,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:10:26,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 13:10:26,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2825, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 13:10:26,338 INFO L87 Difference]: Start difference. First operand 2212 states and 2431 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:10:28,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:10:28,983 INFO L93 Difference]: Finished difference Result 2230 states and 2453 transitions. [2022-03-18 13:10:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 13:10:28,983 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-03-18 13:10:28,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:10:29,004 INFO L225 Difference]: With dead ends: 2230 [2022-03-18 13:10:29,004 INFO L226 Difference]: Without dead ends: 2209 [2022-03-18 13:10:29,032 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=351, Invalid=7305, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 13:10:29,032 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 80 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 2953 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 2995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:10:29,032 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 248 Invalid, 2995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2953 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 13:10:29,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2022-03-18 13:10:30,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 2204. [2022-03-18 13:10:30,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 1970 states have (on average 1.1035532994923858) internal successors, (2174), 2120 states have internal predecessors, (2174), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (170), 78 states have call predecessors, (170), 78 states have call successors, (170) [2022-03-18 13:10:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 2424 transitions. [2022-03-18 13:10:30,529 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 2424 transitions. Word has length 67 [2022-03-18 13:10:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:10:30,529 INFO L478 AbstractCegarLoop]: Abstraction has 2204 states and 2424 transitions. [2022-03-18 13:10:30,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:10:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 2424 transitions. [2022-03-18 13:10:30,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 13:10:30,564 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:10:30,564 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:10:30,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-03-18 13:10:30,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-18 13:10:30,779 INFO L403 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:10:30,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:10:30,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1013254207, now seen corresponding path program 148 times [2022-03-18 13:10:30,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:10:30,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564503685] [2022-03-18 13:10:30,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:10:30,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:10:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:30,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:10:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:30,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:10:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:30,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 13:10:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-18 13:10:31,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:10:31,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564503685] [2022-03-18 13:10:31,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564503685] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:10:31,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754102411] [2022-03-18 13:10:31,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:10:31,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:10:31,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:10:31,187 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:10:31,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-18 13:10:31,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:10:31,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:10:31,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 13:10:31,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:10:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-03-18 13:10:31,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:10:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-03-18 13:10:32,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754102411] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:10:32,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:10:32,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 63 [2022-03-18 13:10:32,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635262881] [2022-03-18 13:10:32,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:10:32,892 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-18 13:10:32,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:10:32,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-18 13:10:32,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3680, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 13:10:32,893 INFO L87 Difference]: Start difference. First operand 2204 states and 2424 transitions. Second operand has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:10:37,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:10:37,845 INFO L93 Difference]: Finished difference Result 2218 states and 2437 transitions. [2022-03-18 13:10:37,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 13:10:37,845 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-03-18 13:10:37,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:10:37,859 INFO L225 Difference]: With dead ends: 2218 [2022-03-18 13:10:37,859 INFO L226 Difference]: Without dead ends: 2186 [2022-03-18 13:10:37,888 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=677, Invalid=9025, Unknown=0, NotChecked=0, Total=9702 [2022-03-18 13:10:37,888 INFO L912 BasicCegarLoop]: 115 mSDtfsCounter, 1309 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 5412 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 5521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 5412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 13:10:37,888 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1326 Valid, 272 Invalid, 5521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 5412 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 13:10:37,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2022-03-18 13:10:39,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2184. [2022-03-18 13:10:39,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2184 states, 1950 states have (on average 1.1035897435897435) internal successors, (2152), 2100 states have internal predecessors, (2152), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (156), 78 states have call predecessors, (156), 78 states have call successors, (156) [2022-03-18 13:10:39,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 2388 transitions. [2022-03-18 13:10:39,262 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 2388 transitions. Word has length 67 [2022-03-18 13:10:39,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:10:39,262 INFO L478 AbstractCegarLoop]: Abstraction has 2184 states and 2388 transitions. [2022-03-18 13:10:39,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:10:39,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 2388 transitions. [2022-03-18 13:10:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 13:10:39,287 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:10:39,287 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:10:39,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-03-18 13:10:39,505 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-18 13:10:39,505 INFO L403 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:10:39,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:10:39,505 INFO L85 PathProgramCache]: Analyzing trace with hash -578788689, now seen corresponding path program 149 times [2022-03-18 13:10:39,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:10:39,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932622861] [2022-03-18 13:10:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:10:39,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:10:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:39,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:10:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:39,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:10:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:39,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 13:10:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:10:40,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:10:40,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932622861] [2022-03-18 13:10:40,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932622861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:10:40,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801338163] [2022-03-18 13:10:40,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:10:40,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:10:40,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:10:40,357 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:10:40,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-18 13:10:40,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-18 13:10:40,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:10:40,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-18 13:10:40,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:10:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:10:42,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:10:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:10:44,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801338163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:10:44,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:10:44,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 109 [2022-03-18 13:10:44,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114741170] [2022-03-18 13:10:44,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:10:44,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-03-18 13:10:44,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:10:44,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-03-18 13:10:44,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=11403, Unknown=0, NotChecked=0, Total=11772 [2022-03-18 13:10:44,562 INFO L87 Difference]: Start difference. First operand 2184 states and 2388 transitions. Second operand has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:10:55,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:10:55,333 INFO L93 Difference]: Finished difference Result 2390 states and 2627 transitions. [2022-03-18 13:10:55,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-18 13:10:55,334 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-03-18 13:10:55,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:10:55,405 INFO L225 Difference]: With dead ends: 2390 [2022-03-18 13:10:55,405 INFO L226 Difference]: Without dead ends: 2376 [2022-03-18 13:10:55,438 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1608, Invalid=29544, Unknown=0, NotChecked=0, Total=31152 [2022-03-18 13:10:55,438 INFO L912 BasicCegarLoop]: 184 mSDtfsCounter, 3404 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 15871 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3409 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 16232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 15871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-18 13:10:55,438 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3409 Valid, 486 Invalid, 16232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 15871 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-03-18 13:10:55,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2022-03-18 13:10:57,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2367. [2022-03-18 13:10:57,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2112 states have (on average 1.103219696969697) internal successors, (2330), 2276 states have internal predecessors, (2330), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (177), 85 states have call predecessors, (177), 85 states have call successors, (177) [2022-03-18 13:10:57,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 2594 transitions. [2022-03-18 13:10:57,031 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 2594 transitions. Word has length 68 [2022-03-18 13:10:57,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:10:57,031 INFO L478 AbstractCegarLoop]: Abstraction has 2367 states and 2594 transitions. [2022-03-18 13:10:57,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:10:57,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 2594 transitions. [2022-03-18 13:10:57,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 13:10:57,142 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:10:57,142 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:10:57,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-03-18 13:10:57,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-18 13:10:57,347 INFO L403 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:10:57,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:10:57,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1079345620, now seen corresponding path program 150 times [2022-03-18 13:10:57,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:10:57,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632107824] [2022-03-18 13:10:57,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:10:57,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:10:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:57,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:10:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:57,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:10:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:57,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 13:10:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:10:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:10:58,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:10:58,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632107824] [2022-03-18 13:10:58,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632107824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:10:58,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60650280] [2022-03-18 13:10:58,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:10:58,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:10:58,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:10:58,054 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:10:58,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-18 13:10:58,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-18 13:10:58,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:10:58,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-18 13:10:58,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:10:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:10:59,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:11:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:11:02,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60650280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:11:02,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:11:02,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 109 [2022-03-18 13:11:02,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10515954] [2022-03-18 13:11:02,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:11:02,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-03-18 13:11:02,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:11:02,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-03-18 13:11:02,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=11403, Unknown=0, NotChecked=0, Total=11772 [2022-03-18 13:11:02,018 INFO L87 Difference]: Start difference. First operand 2367 states and 2594 transitions. Second operand has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:11:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:11:13,165 INFO L93 Difference]: Finished difference Result 2382 states and 2609 transitions. [2022-03-18 13:11:13,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-18 13:11:13,165 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-03-18 13:11:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:11:13,260 INFO L225 Difference]: With dead ends: 2382 [2022-03-18 13:11:13,260 INFO L226 Difference]: Without dead ends: 2370 [2022-03-18 13:11:13,294 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4663 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1608, Invalid=29544, Unknown=0, NotChecked=0, Total=31152 [2022-03-18 13:11:13,294 INFO L912 BasicCegarLoop]: 188 mSDtfsCounter, 3487 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 16182 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3520 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 16511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 16182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-18 13:11:13,294 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3520 Valid, 485 Invalid, 16511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 16182 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-03-18 13:11:13,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2022-03-18 13:11:14,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 2368. [2022-03-18 13:11:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2113 states have (on average 1.1031708471367723) internal successors, (2331), 2277 states have internal predecessors, (2331), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (169), 85 states have call predecessors, (169), 85 states have call successors, (169) [2022-03-18 13:11:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 2587 transitions. [2022-03-18 13:11:14,867 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 2587 transitions. Word has length 68 [2022-03-18 13:11:14,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:11:14,867 INFO L478 AbstractCegarLoop]: Abstraction has 2368 states and 2587 transitions. [2022-03-18 13:11:14,867 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:11:14,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 2587 transitions. [2022-03-18 13:11:14,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 13:11:14,897 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:11:14,897 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:11:14,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-03-18 13:11:15,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:11:15,108 INFO L403 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:11:15,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:11:15,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1538600402, now seen corresponding path program 151 times [2022-03-18 13:11:15,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:11:15,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812246776] [2022-03-18 13:11:15,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:11:15,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:11:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:15,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:11:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:15,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:11:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:15,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 13:11:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-18 13:11:15,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:11:15,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812246776] [2022-03-18 13:11:15,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812246776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:11:15,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717428252] [2022-03-18 13:11:15,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:11:15,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:11:15,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:11:15,274 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:11:15,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-18 13:11:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:15,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 13:11:15,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:11:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-18 13:11:15,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:11:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-18 13:11:15,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717428252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:11:15,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:11:15,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 31 [2022-03-18 13:11:15,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7629422] [2022-03-18 13:11:15,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:11:15,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 13:11:15,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:11:15,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 13:11:15,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2022-03-18 13:11:15,750 INFO L87 Difference]: Start difference. First operand 2368 states and 2587 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:11:18,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:11:18,194 INFO L93 Difference]: Finished difference Result 3558 states and 3832 transitions. [2022-03-18 13:11:18,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-18 13:11:18,194 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2022-03-18 13:11:18,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:11:18,323 INFO L225 Difference]: With dead ends: 3558 [2022-03-18 13:11:18,323 INFO L226 Difference]: Without dead ends: 2373 [2022-03-18 13:11:18,362 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2226, Invalid=5084, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 13:11:18,362 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 138 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:11:18,362 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 81 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 13:11:18,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2022-03-18 13:11:19,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2365. [2022-03-18 13:11:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2116 states have (on average 1.1011342155009451) internal successors, (2330), 2276 states have internal predecessors, (2330), 85 states have call successors, (85), 5 states have call predecessors, (85), 163 states have return successors, (163), 83 states have call predecessors, (163), 83 states have call successors, (163) [2022-03-18 13:11:19,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 2578 transitions. [2022-03-18 13:11:19,931 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 2578 transitions. Word has length 68 [2022-03-18 13:11:19,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:11:19,931 INFO L478 AbstractCegarLoop]: Abstraction has 2365 states and 2578 transitions. [2022-03-18 13:11:19,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:11:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 2578 transitions. [2022-03-18 13:11:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 13:11:19,960 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:11:19,960 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:11:19,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-03-18 13:11:20,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2022-03-18 13:11:20,163 INFO L403 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:11:20,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:11:20,164 INFO L85 PathProgramCache]: Analyzing trace with hash 504471117, now seen corresponding path program 152 times [2022-03-18 13:11:20,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:11:20,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912533906] [2022-03-18 13:11:20,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:11:20,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:11:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:20,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:11:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:20,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:11:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:20,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 13:11:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-18 13:11:20,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:11:20,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912533906] [2022-03-18 13:11:20,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912533906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:11:20,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341018270] [2022-03-18 13:11:20,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:11:20,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:11:20,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:11:20,338 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:11:20,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-18 13:11:20,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:11:20,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:11:20,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 13:11:20,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:11:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-18 13:11:20,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:11:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-18 13:11:20,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341018270] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:11:20,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:11:20,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 31 [2022-03-18 13:11:20,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322236286] [2022-03-18 13:11:20,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:11:20,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 13:11:20,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:11:20,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 13:11:20,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2022-03-18 13:11:20,821 INFO L87 Difference]: Start difference. First operand 2365 states and 2578 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:11:23,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:11:23,369 INFO L93 Difference]: Finished difference Result 2439 states and 2668 transitions. [2022-03-18 13:11:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-18 13:11:23,369 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2022-03-18 13:11:23,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:11:23,384 INFO L225 Difference]: With dead ends: 2439 [2022-03-18 13:11:23,384 INFO L226 Difference]: Without dead ends: 2382 [2022-03-18 13:11:23,416 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2226, Invalid=5084, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 13:11:23,416 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 168 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:11:23,416 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 70 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 13:11:23,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2022-03-18 13:11:25,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2382. [2022-03-18 13:11:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2133 states have (on average 1.1003281762775434) internal successors, (2347), 2293 states have internal predecessors, (2347), 85 states have call successors, (85), 5 states have call predecessors, (85), 163 states have return successors, (163), 83 states have call predecessors, (163), 83 states have call successors, (163) [2022-03-18 13:11:25,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 2595 transitions. [2022-03-18 13:11:25,087 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 2595 transitions. Word has length 68 [2022-03-18 13:11:25,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:11:25,087 INFO L478 AbstractCegarLoop]: Abstraction has 2382 states and 2595 transitions. [2022-03-18 13:11:25,087 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:11:25,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 2595 transitions. [2022-03-18 13:11:25,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 13:11:25,118 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:11:25,118 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:11:25,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-03-18 13:11:25,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:11:25,336 INFO L403 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:11:25,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:11:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash -119448275, now seen corresponding path program 153 times [2022-03-18 13:11:25,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:11:25,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144795298] [2022-03-18 13:11:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:11:25,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:11:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:25,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:11:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:25,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:11:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:25,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 13:11:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:11:26,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:11:26,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144795298] [2022-03-18 13:11:26,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144795298] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:11:26,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127228826] [2022-03-18 13:11:26,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:11:26,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:11:26,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:11:26,320 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:11:26,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-18 13:11:26,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-18 13:11:26,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:11:26,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-18 13:11:26,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:11:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:11:26,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:11:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:11:27,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127228826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:11:27,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:11:27,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 57 [2022-03-18 13:11:27,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410864806] [2022-03-18 13:11:27,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:11:27,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 13:11:27,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:11:27,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 13:11:27,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3071, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 13:11:27,120 INFO L87 Difference]: Start difference. First operand 2382 states and 2595 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:11:32,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:11:32,964 INFO L93 Difference]: Finished difference Result 2590 states and 2824 transitions. [2022-03-18 13:11:32,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-18 13:11:32,964 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-18 13:11:32,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:11:32,989 INFO L225 Difference]: With dead ends: 2590 [2022-03-18 13:11:32,989 INFO L226 Difference]: Without dead ends: 2584 [2022-03-18 13:11:33,024 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=349, Invalid=10781, Unknown=0, NotChecked=0, Total=11130 [2022-03-18 13:11:33,024 INFO L912 BasicCegarLoop]: 189 mSDtfsCounter, 421 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 14344 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 14418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 14344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:11:33,024 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 436 Invalid, 14418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 14344 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-18 13:11:33,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-03-18 13:11:34,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2398. [2022-03-18 13:11:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2146 states have (on average 1.1006523765144456) internal successors, (2362), 2308 states have internal predecessors, (2362), 86 states have call successors, (86), 5 states have call predecessors, (86), 165 states have return successors, (166), 84 states have call predecessors, (166), 84 states have call successors, (166) [2022-03-18 13:11:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 2614 transitions. [2022-03-18 13:11:34,688 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 2614 transitions. Word has length 69 [2022-03-18 13:11:34,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:11:34,688 INFO L478 AbstractCegarLoop]: Abstraction has 2398 states and 2614 transitions. [2022-03-18 13:11:34,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:11:34,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 2614 transitions. [2022-03-18 13:11:34,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 13:11:34,718 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:11:34,718 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:11:34,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-03-18 13:11:34,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:11:34,935 INFO L403 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:11:34,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:11:34,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1262505363, now seen corresponding path program 154 times [2022-03-18 13:11:34,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:11:34,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837646674] [2022-03-18 13:11:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:11:34,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:11:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:35,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:11:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:35,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:11:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:35,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 13:11:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:11:35,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:11:35,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837646674] [2022-03-18 13:11:35,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837646674] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:11:35,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570573799] [2022-03-18 13:11:35,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:11:35,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:11:35,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:11:35,914 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:11:35,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-18 13:11:36,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:11:36,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:11:36,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-18 13:11:36,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:11:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:11:36,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:11:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:11:36,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570573799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:11:36,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:11:36,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 57 [2022-03-18 13:11:36,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656460822] [2022-03-18 13:11:36,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:11:36,986 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 13:11:36,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:11:36,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 13:11:36,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3067, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 13:11:36,987 INFO L87 Difference]: Start difference. First operand 2398 states and 2614 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:11:42,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:11:42,676 INFO L93 Difference]: Finished difference Result 2404 states and 2619 transitions. [2022-03-18 13:11:42,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-18 13:11:42,676 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-18 13:11:42,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:11:42,692 INFO L225 Difference]: With dead ends: 2404 [2022-03-18 13:11:42,692 INFO L226 Difference]: Without dead ends: 2382 [2022-03-18 13:11:42,725 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 126 SyntacticMatches, 9 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=351, Invalid=10361, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 13:11:42,725 INFO L912 BasicCegarLoop]: 174 mSDtfsCounter, 330 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 13177 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 13228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 13177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:11:42,725 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 421 Invalid, 13228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 13177 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-18 13:11:42,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2022-03-18 13:11:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2382. [2022-03-18 13:11:44,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2133 states have (on average 1.1003281762775434) internal successors, (2347), 2293 states have internal predecessors, (2347), 85 states have call successors, (85), 5 states have call predecessors, (85), 163 states have return successors, (164), 83 states have call predecessors, (164), 83 states have call successors, (164) [2022-03-18 13:11:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 2596 transitions. [2022-03-18 13:11:44,334 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 2596 transitions. Word has length 69 [2022-03-18 13:11:44,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:11:44,334 INFO L478 AbstractCegarLoop]: Abstraction has 2382 states and 2596 transitions. [2022-03-18 13:11:44,334 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:11:44,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 2596 transitions. [2022-03-18 13:11:44,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 13:11:44,364 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:11:44,364 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:11:44,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-03-18 13:11:44,581 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:11:44,581 INFO L403 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:11:44,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:11:44,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1781210413, now seen corresponding path program 155 times [2022-03-18 13:11:44,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:11:44,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588809492] [2022-03-18 13:11:44,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:11:44,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:11:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:44,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:11:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:44,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:11:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:44,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 13:11:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:11:45,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:11:45,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588809492] [2022-03-18 13:11:45,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588809492] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:11:45,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027569926] [2022-03-18 13:11:45,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:11:45,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:11:45,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:11:45,380 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:11:45,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-18 13:11:45,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-18 13:11:45,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:11:45,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-18 13:11:45,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:11:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:11:46,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:11:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:11:46,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027569926] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:11:46,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:11:46,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 57 [2022-03-18 13:11:46,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020070051] [2022-03-18 13:11:46,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:11:46,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 13:11:46,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:11:46,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 13:11:46,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=3063, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 13:11:46,621 INFO L87 Difference]: Start difference. First operand 2382 states and 2596 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:11:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:11:51,053 INFO L93 Difference]: Finished difference Result 2388 states and 2601 transitions. [2022-03-18 13:11:51,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 13:11:51,054 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-18 13:11:51,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:11:51,076 INFO L225 Difference]: With dead ends: 2388 [2022-03-18 13:11:51,076 INFO L226 Difference]: Without dead ends: 2364 [2022-03-18 13:11:51,111 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 124 SyntacticMatches, 9 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=353, Invalid=9949, Unknown=0, NotChecked=0, Total=10302 [2022-03-18 13:11:51,111 INFO L912 BasicCegarLoop]: 154 mSDtfsCounter, 291 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 10534 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 10584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 10534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:11:51,111 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 376 Invalid, 10584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 10534 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-18 13:11:51,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2022-03-18 13:11:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2364. [2022-03-18 13:11:52,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2118 states have (on average 1.1000944287063268) internal successors, (2330), 2276 states have internal predecessors, (2330), 84 states have call successors, (84), 5 states have call predecessors, (84), 161 states have return successors, (162), 82 states have call predecessors, (162), 82 states have call successors, (162) [2022-03-18 13:11:52,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 2576 transitions. [2022-03-18 13:11:52,885 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 2576 transitions. Word has length 69 [2022-03-18 13:11:52,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:11:52,885 INFO L478 AbstractCegarLoop]: Abstraction has 2364 states and 2576 transitions. [2022-03-18 13:11:52,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:11:52,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 2576 transitions. [2022-03-18 13:11:52,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 13:11:52,917 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:11:52,917 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:11:52,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-03-18 13:11:53,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:11:53,136 INFO L403 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:11:53,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:11:53,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1268059539, now seen corresponding path program 156 times [2022-03-18 13:11:53,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:11:53,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969340801] [2022-03-18 13:11:53,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:11:53,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:11:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:53,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:11:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:53,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:11:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:53,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 13:11:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:11:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:11:53,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:11:53,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969340801] [2022-03-18 13:11:53,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969340801] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:11:53,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2323760] [2022-03-18 13:11:53,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:11:53,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:11:53,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:11:53,999 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:11:53,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-18 13:11:54,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 13:11:54,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:11:54,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-18 13:11:54,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:11:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:11:54,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:11:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:11:55,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2323760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:11:55,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:11:55,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 57 [2022-03-18 13:11:55,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491449065] [2022-03-18 13:11:55,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:11:55,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 13:11:55,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:11:55,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 13:11:55,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=3059, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 13:11:55,207 INFO L87 Difference]: Start difference. First operand 2364 states and 2576 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:12:00,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:12:00,091 INFO L93 Difference]: Finished difference Result 2370 states and 2581 transitions. [2022-03-18 13:12:00,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 13:12:00,092 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-18 13:12:00,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:12:00,109 INFO L225 Difference]: With dead ends: 2370 [2022-03-18 13:12:00,110 INFO L226 Difference]: Without dead ends: 2344 [2022-03-18 13:12:00,162 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=355, Invalid=9545, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 13:12:00,162 INFO L912 BasicCegarLoop]: 134 mSDtfsCounter, 251 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 9844 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 9892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 9844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-18 13:12:00,162 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 371 Invalid, 9892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 9844 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-18 13:12:00,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2022-03-18 13:12:01,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2344. [2022-03-18 13:12:01,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2101 states have (on average 1.0999524036173252) internal successors, (2311), 2257 states have internal predecessors, (2311), 83 states have call successors, (83), 5 states have call predecessors, (83), 159 states have return successors, (160), 81 states have call predecessors, (160), 81 states have call successors, (160) [2022-03-18 13:12:01,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 2554 transitions. [2022-03-18 13:12:01,933 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 2554 transitions. Word has length 69 [2022-03-18 13:12:01,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:12:01,933 INFO L478 AbstractCegarLoop]: Abstraction has 2344 states and 2554 transitions. [2022-03-18 13:12:01,933 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:12:01,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 2554 transitions. [2022-03-18 13:12:01,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 13:12:01,959 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:12:01,959 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:12:01,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-03-18 13:12:02,174 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:12:02,174 INFO L403 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:12:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:12:02,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1400185555, now seen corresponding path program 157 times [2022-03-18 13:12:02,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:12:02,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747124358] [2022-03-18 13:12:02,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:12:02,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:12:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:02,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:12:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:02,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:12:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:02,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 13:12:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:12:02,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:12:02,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747124358] [2022-03-18 13:12:02,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747124358] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:12:02,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662212000] [2022-03-18 13:12:02,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:12:02,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:12:02,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:12:02,998 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:12:02,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-18 13:12:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:03,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 13:12:03,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:12:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:12:03,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:12:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:12:04,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662212000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:12:04,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:12:04,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 57 [2022-03-18 13:12:04,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405310464] [2022-03-18 13:12:04,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:12:04,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 13:12:04,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:12:04,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 13:12:04,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=3055, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 13:12:04,339 INFO L87 Difference]: Start difference. First operand 2344 states and 2554 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:12:08,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:12:08,717 INFO L93 Difference]: Finished difference Result 2350 states and 2559 transitions. [2022-03-18 13:12:08,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 13:12:08,718 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-18 13:12:08,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:12:08,732 INFO L225 Difference]: With dead ends: 2350 [2022-03-18 13:12:08,732 INFO L226 Difference]: Without dead ends: 2322 [2022-03-18 13:12:08,763 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=357, Invalid=9149, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 13:12:08,763 INFO L912 BasicCegarLoop]: 114 mSDtfsCounter, 213 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 8266 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 8312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 8266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:12:08,763 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 346 Invalid, 8312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 8266 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-18 13:12:08,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-03-18 13:12:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2322. [2022-03-18 13:12:10,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2322 states, 2082 states have (on average 1.0999039385206533) internal successors, (2290), 2236 states have internal predecessors, (2290), 82 states have call successors, (82), 5 states have call predecessors, (82), 157 states have return successors, (158), 80 states have call predecessors, (158), 80 states have call successors, (158) [2022-03-18 13:12:10,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2322 states to 2322 states and 2530 transitions. [2022-03-18 13:12:10,375 INFO L78 Accepts]: Start accepts. Automaton has 2322 states and 2530 transitions. Word has length 69 [2022-03-18 13:12:10,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:12:10,375 INFO L478 AbstractCegarLoop]: Abstraction has 2322 states and 2530 transitions. [2022-03-18 13:12:10,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:12:10,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2322 states and 2530 transitions. [2022-03-18 13:12:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 13:12:10,406 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:12:10,406 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:12:10,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-03-18 13:12:10,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-03-18 13:12:10,624 INFO L403 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:12:10,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:12:10,624 INFO L85 PathProgramCache]: Analyzing trace with hash -788516243, now seen corresponding path program 158 times [2022-03-18 13:12:10,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:12:10,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788758994] [2022-03-18 13:12:10,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:12:10,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:12:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:10,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:12:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:10,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:12:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:10,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 13:12:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:12:11,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:12:11,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788758994] [2022-03-18 13:12:11,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788758994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:12:11,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187714097] [2022-03-18 13:12:11,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:12:11,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:12:11,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:12:11,343 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:12:11,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-18 13:12:11,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:12:11,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:12:11,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-18 13:12:11,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:12:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:12:12,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:12:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:12:12,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187714097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:12:12,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:12:12,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 57 [2022-03-18 13:12:12,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788997262] [2022-03-18 13:12:12,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:12:12,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 13:12:12,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:12:12,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 13:12:12,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3051, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 13:12:12,553 INFO L87 Difference]: Start difference. First operand 2322 states and 2530 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:12:16,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:12:16,687 INFO L93 Difference]: Finished difference Result 2328 states and 2535 transitions. [2022-03-18 13:12:16,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 13:12:16,687 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-18 13:12:16,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:12:16,702 INFO L225 Difference]: With dead ends: 2328 [2022-03-18 13:12:16,702 INFO L226 Difference]: Without dead ends: 2298 [2022-03-18 13:12:16,732 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=359, Invalid=8761, Unknown=0, NotChecked=0, Total=9120 [2022-03-18 13:12:16,733 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 173 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 6633 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 6677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 6633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:12:16,733 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 316 Invalid, 6677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 6633 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 13:12:16,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2022-03-18 13:12:18,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2298. [2022-03-18 13:12:18,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2061 states have (on average 1.0999514798641437) internal successors, (2267), 2213 states have internal predecessors, (2267), 81 states have call successors, (81), 5 states have call predecessors, (81), 155 states have return successors, (156), 79 states have call predecessors, (156), 79 states have call successors, (156) [2022-03-18 13:12:18,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 2504 transitions. [2022-03-18 13:12:18,281 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 2504 transitions. Word has length 69 [2022-03-18 13:12:18,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:12:18,281 INFO L478 AbstractCegarLoop]: Abstraction has 2298 states and 2504 transitions. [2022-03-18 13:12:18,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:12:18,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 2504 transitions. [2022-03-18 13:12:18,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 13:12:18,308 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:12:18,308 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:12:18,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-03-18 13:12:18,522 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:12:18,522 INFO L403 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:12:18,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:12:18,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1006673197, now seen corresponding path program 159 times [2022-03-18 13:12:18,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:12:18,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609298462] [2022-03-18 13:12:18,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:12:18,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:12:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:18,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:12:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:18,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:12:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:18,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 13:12:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 13:12:19,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:12:19,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609298462] [2022-03-18 13:12:19,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609298462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:12:19,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625365599] [2022-03-18 13:12:19,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:12:19,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:12:19,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:12:19,201 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:12:19,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-18 13:12:19,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-18 13:12:19,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:12:19,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 13:12:19,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:12:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 13:12:20,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:12:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 13:12:20,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625365599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:12:20,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:12:20,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 57 [2022-03-18 13:12:20,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544368431] [2022-03-18 13:12:20,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:12:20,648 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 13:12:20,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:12:20,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 13:12:20,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3047, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 13:12:20,649 INFO L87 Difference]: Start difference. First operand 2298 states and 2504 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:12:24,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:12:24,193 INFO L93 Difference]: Finished difference Result 2304 states and 2509 transitions. [2022-03-18 13:12:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 13:12:24,193 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-18 13:12:24,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:12:24,207 INFO L225 Difference]: With dead ends: 2304 [2022-03-18 13:12:24,207 INFO L226 Difference]: Without dead ends: 2272 [2022-03-18 13:12:24,237 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=361, Invalid=8381, Unknown=0, NotChecked=0, Total=8742 [2022-03-18 13:12:24,237 INFO L912 BasicCegarLoop]: 74 mSDtfsCounter, 135 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5050 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 5092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 5050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 13:12:24,237 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 286 Invalid, 5092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 5050 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 13:12:24,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2022-03-18 13:12:25,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 2272. [2022-03-18 13:12:25,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2038 states have (on average 1.100098135426889) internal successors, (2242), 2188 states have internal predecessors, (2242), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (154), 78 states have call predecessors, (154), 78 states have call successors, (154) [2022-03-18 13:12:25,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 2476 transitions. [2022-03-18 13:12:25,870 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 2476 transitions. Word has length 69 [2022-03-18 13:12:25,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:12:25,870 INFO L478 AbstractCegarLoop]: Abstraction has 2272 states and 2476 transitions. [2022-03-18 13:12:25,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:12:25,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 2476 transitions. [2022-03-18 13:12:25,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 13:12:25,896 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:12:25,896 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:12:25,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-03-18 13:12:26,116 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:12:26,116 INFO L403 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:12:26,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:12:26,116 INFO L85 PathProgramCache]: Analyzing trace with hash -562072979, now seen corresponding path program 160 times [2022-03-18 13:12:26,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:12:26,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302987200] [2022-03-18 13:12:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:12:26,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:12:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:26,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:12:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:26,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:12:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:26,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 13:12:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 13:12:26,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:12:26,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302987200] [2022-03-18 13:12:26,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302987200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:12:26,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068888799] [2022-03-18 13:12:26,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:12:26,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:12:26,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:12:26,754 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:12:26,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-18 13:12:26,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:12:26,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:12:26,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 13:12:26,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:12:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 13:12:27,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:12:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 13:12:28,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068888799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:12:28,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:12:28,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 57 [2022-03-18 13:12:28,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866320695] [2022-03-18 13:12:28,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:12:28,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 13:12:28,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:12:28,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 13:12:28,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3043, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 13:12:28,243 INFO L87 Difference]: Start difference. First operand 2272 states and 2476 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:12:31,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:12:31,580 INFO L93 Difference]: Finished difference Result 2278 states and 2481 transitions. [2022-03-18 13:12:31,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 13:12:31,581 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-18 13:12:31,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:12:31,594 INFO L225 Difference]: With dead ends: 2278 [2022-03-18 13:12:31,594 INFO L226 Difference]: Without dead ends: 2244 [2022-03-18 13:12:31,625 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=363, Invalid=8009, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 13:12:31,625 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 95 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 3649 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 3689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:12:31,626 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 256 Invalid, 3689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3649 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 13:12:31,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2022-03-18 13:12:33,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2244. [2022-03-18 13:12:33,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2013 states have (on average 1.100347739692002) internal successors, (2215), 2161 states have internal predecessors, (2215), 79 states have call successors, (79), 5 states have call predecessors, (79), 151 states have return successors, (152), 77 states have call predecessors, (152), 77 states have call successors, (152) [2022-03-18 13:12:33,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 2446 transitions. [2022-03-18 13:12:33,175 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 2446 transitions. Word has length 69 [2022-03-18 13:12:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:12:33,175 INFO L478 AbstractCegarLoop]: Abstraction has 2244 states and 2446 transitions. [2022-03-18 13:12:33,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:12:33,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 2446 transitions. [2022-03-18 13:12:33,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 13:12:33,201 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:12:33,202 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:12:33,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-03-18 13:12:33,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-18 13:12:33,408 INFO L403 AbstractCegarLoop]: === Iteration 171 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:12:33,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:12:33,408 INFO L85 PathProgramCache]: Analyzing trace with hash -192127699, now seen corresponding path program 161 times [2022-03-18 13:12:33,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:12:33,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126160147] [2022-03-18 13:12:33,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:12:33,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:12:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:33,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:12:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:33,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:12:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:33,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 13:12:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-18 13:12:33,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:12:33,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126160147] [2022-03-18 13:12:33,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126160147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:12:33,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995935559] [2022-03-18 13:12:33,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:12:33,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:12:33,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:12:33,995 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:12:33,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-18 13:12:34,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-18 13:12:34,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:12:34,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 13:12:34,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:12:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-18 13:12:35,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:12:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-18 13:12:35,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995935559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:12:35,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:12:35,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 57 [2022-03-18 13:12:35,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107774920] [2022-03-18 13:12:35,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:12:35,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 13:12:35,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:12:35,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 13:12:35,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3039, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 13:12:35,497 INFO L87 Difference]: Start difference. First operand 2244 states and 2446 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:12:38,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:12:38,181 INFO L93 Difference]: Finished difference Result 2262 states and 2467 transitions. [2022-03-18 13:12:38,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 13:12:38,182 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-18 13:12:38,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:12:38,208 INFO L225 Difference]: With dead ends: 2262 [2022-03-18 13:12:38,209 INFO L226 Difference]: Without dead ends: 2256 [2022-03-18 13:12:38,243 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=365, Invalid=7645, Unknown=0, NotChecked=0, Total=8010 [2022-03-18 13:12:38,243 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 2536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 13:12:38,243 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 233 Invalid, 2536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2493 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 13:12:38,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-03-18 13:12:39,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 2254. [2022-03-18 13:12:39,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2020 states have (on average 1.100990099009901) internal successors, (2224), 2170 states have internal predecessors, (2224), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (155), 78 states have call predecessors, (155), 78 states have call successors, (155) [2022-03-18 13:12:39,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 2459 transitions. [2022-03-18 13:12:39,809 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 2459 transitions. Word has length 69 [2022-03-18 13:12:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:12:39,809 INFO L478 AbstractCegarLoop]: Abstraction has 2254 states and 2459 transitions. [2022-03-18 13:12:39,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:12:39,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 2459 transitions. [2022-03-18 13:12:39,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-18 13:12:39,834 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:12:39,834 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:12:39,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-03-18 13:12:40,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:12:40,051 INFO L403 AbstractCegarLoop]: === Iteration 172 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:12:40,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:12:40,051 INFO L85 PathProgramCache]: Analyzing trace with hash -427401652, now seen corresponding path program 162 times [2022-03-18 13:12:40,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:12:40,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250270027] [2022-03-18 13:12:40,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:12:40,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:12:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:40,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:12:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:40,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:12:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:40,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 13:12:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:12:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:12:40,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:12:40,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250270027] [2022-03-18 13:12:40,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250270027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:12:40,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450528402] [2022-03-18 13:12:40,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:12:40,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:12:40,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:12:40,857 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:12:40,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-18 13:12:41,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-18 13:12:41,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:12:41,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-18 13:12:41,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:12:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:12:42,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:12:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:12:45,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450528402] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:12:45,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:12:45,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41, 41] total 115 [2022-03-18 13:12:45,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098297722] [2022-03-18 13:12:45,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:12:45,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-03-18 13:12:45,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:12:45,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-03-18 13:12:45,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=12720, Unknown=0, NotChecked=0, Total=13110 [2022-03-18 13:12:45,518 INFO L87 Difference]: Start difference. First operand 2254 states and 2459 transitions. Second operand has 115 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 114 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:12:59,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:12:59,688 INFO L93 Difference]: Finished difference Result 2462 states and 2700 transitions. [2022-03-18 13:12:59,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-18 13:12:59,689 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 114 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 70 [2022-03-18 13:12:59,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:12:59,771 INFO L225 Difference]: With dead ends: 2462 [2022-03-18 13:12:59,772 INFO L226 Difference]: Without dead ends: 2448 [2022-03-18 13:12:59,807 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5204 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1756, Invalid=33026, Unknown=0, NotChecked=0, Total=34782 [2022-03-18 13:12:59,807 INFO L912 BasicCegarLoop]: 194 mSDtfsCounter, 3819 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 19612 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3824 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 20012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 19612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:12:59,807 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3824 Valid, 551 Invalid, 20012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 19612 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-03-18 13:12:59,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2022-03-18 13:13:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2439. [2022-03-18 13:13:01,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2439 states, 2184 states have (on average 1.1007326007326008) internal successors, (2404), 2348 states have internal predecessors, (2404), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (176), 85 states have call predecessors, (176), 85 states have call successors, (176) [2022-03-18 13:13:01,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2439 states to 2439 states and 2667 transitions. [2022-03-18 13:13:01,528 INFO L78 Accepts]: Start accepts. Automaton has 2439 states and 2667 transitions. Word has length 70 [2022-03-18 13:13:01,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:13:01,528 INFO L478 AbstractCegarLoop]: Abstraction has 2439 states and 2667 transitions. [2022-03-18 13:13:01,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 114 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:13:01,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2439 states and 2667 transitions. [2022-03-18 13:13:01,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-18 13:13:01,556 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:13:01,556 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:13:01,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-03-18 13:13:01,774 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2022-03-18 13:13:01,774 INFO L403 AbstractCegarLoop]: === Iteration 173 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:13:01,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:13:01,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1235202671, now seen corresponding path program 163 times [2022-03-18 13:13:01,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:13:01,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767866466] [2022-03-18 13:13:01,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:01,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:13:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:01,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:13:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:01,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:13:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:02,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 13:13:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:13:02,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:13:02,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767866466] [2022-03-18 13:13:02,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767866466] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:13:02,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241341078] [2022-03-18 13:13:02,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:13:02,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:02,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:13:02,684 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:13:02,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-18 13:13:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:02,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-18 13:13:02,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:13:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:13:04,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:13:06,250 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:13:06,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241341078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:13:06,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:13:06,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41, 41] total 115 [2022-03-18 13:13:06,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17711910] [2022-03-18 13:13:06,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:13:06,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-03-18 13:13:06,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:13:06,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-03-18 13:13:06,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=12720, Unknown=0, NotChecked=0, Total=13110 [2022-03-18 13:13:06,253 INFO L87 Difference]: Start difference. First operand 2439 states and 2667 transitions. Second operand has 115 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 114 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:13:21,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:13:21,101 INFO L93 Difference]: Finished difference Result 2454 states and 2682 transitions. [2022-03-18 13:13:21,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-18 13:13:21,101 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 114 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 70 [2022-03-18 13:13:21,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:13:21,117 INFO L225 Difference]: With dead ends: 2454 [2022-03-18 13:13:21,118 INFO L226 Difference]: Without dead ends: 2442 [2022-03-18 13:13:21,184 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5225 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1756, Invalid=33026, Unknown=0, NotChecked=0, Total=34782 [2022-03-18 13:13:21,185 INFO L912 BasicCegarLoop]: 198 mSDtfsCounter, 3768 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 19315 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3803 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 19681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 19315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:13:21,185 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3803 Valid, 535 Invalid, 19681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 19315 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-03-18 13:13:21,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2022-03-18 13:13:23,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2440. [2022-03-18 13:13:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2185 states have (on average 1.1006864988558351) internal successors, (2405), 2349 states have internal predecessors, (2405), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (168), 85 states have call predecessors, (168), 85 states have call successors, (168) [2022-03-18 13:13:23,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 2660 transitions. [2022-03-18 13:13:23,031 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 2660 transitions. Word has length 70 [2022-03-18 13:13:23,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:13:23,031 INFO L478 AbstractCegarLoop]: Abstraction has 2440 states and 2660 transitions. [2022-03-18 13:13:23,031 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 114 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:13:23,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 2660 transitions. [2022-03-18 13:13:23,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-18 13:13:23,062 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:13:23,062 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:13:23,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-03-18 13:13:23,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:23,279 INFO L403 AbstractCegarLoop]: === Iteration 174 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:13:23,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:13:23,280 INFO L85 PathProgramCache]: Analyzing trace with hash -311854515, now seen corresponding path program 164 times [2022-03-18 13:13:23,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:13:23,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701617323] [2022-03-18 13:13:23,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:23,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:13:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:23,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:13:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:23,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:13:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:23,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 13:13:23,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-18 13:13:23,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:13:23,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701617323] [2022-03-18 13:13:23,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701617323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:13:23,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346773216] [2022-03-18 13:13:23,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:13:23,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:23,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:13:23,464 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:13:23,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-18 13:13:23,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:13:23,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:13:23,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 13:13:23,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:13:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-18 13:13:23,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:13:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-18 13:13:23,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346773216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:13:23,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:13:23,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 33 [2022-03-18 13:13:23,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120187937] [2022-03-18 13:13:23,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:13:23,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 13:13:23,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:13:23,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 13:13:23,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 13:13:23,952 INFO L87 Difference]: Start difference. First operand 2440 states and 2660 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:13:27,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:13:27,051 INFO L93 Difference]: Finished difference Result 2790 states and 3065 transitions. [2022-03-18 13:13:27,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-18 13:13:27,052 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 70 [2022-03-18 13:13:27,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:13:27,075 INFO L225 Difference]: With dead ends: 2790 [2022-03-18 13:13:27,075 INFO L226 Difference]: Without dead ends: 2712 [2022-03-18 13:13:27,124 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2208 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2242, Invalid=7264, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 13:13:27,125 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 214 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 13:13:27,125 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 91 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 13:13:27,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2022-03-18 13:13:29,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2658. [2022-03-18 13:13:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2403 states have (on average 1.0994590095713692) internal successors, (2642), 2567 states have internal predecessors, (2642), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (168), 85 states have call predecessors, (168), 85 states have call successors, (168) [2022-03-18 13:13:29,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 2897 transitions. [2022-03-18 13:13:29,275 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 2897 transitions. Word has length 70 [2022-03-18 13:13:29,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:13:29,276 INFO L478 AbstractCegarLoop]: Abstraction has 2658 states and 2897 transitions. [2022-03-18 13:13:29,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:13:29,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 2897 transitions. [2022-03-18 13:13:29,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-18 13:13:29,312 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:13:29,312 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:13:29,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-03-18 13:13:29,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:29,515 INFO L403 AbstractCegarLoop]: === Iteration 175 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:13:29,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:13:29,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1401146866, now seen corresponding path program 165 times [2022-03-18 13:13:29,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:13:29,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714263056] [2022-03-18 13:13:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:29,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:13:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:29,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:13:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:29,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:13:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:29,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 13:13:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-18 13:13:29,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:13:29,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714263056] [2022-03-18 13:13:29,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714263056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:13:29,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056706842] [2022-03-18 13:13:29,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:13:29,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:29,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:13:29,708 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:13:29,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-18 13:13:29,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-18 13:13:29,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:13:29,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 13:13:29,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:13:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-18 13:13:30,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:13:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-18 13:13:30,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056706842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:13:30,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:13:30,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 33 [2022-03-18 13:13:30,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561184606] [2022-03-18 13:13:30,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:13:30,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 13:13:30,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:13:30,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 13:13:30,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 13:13:30,271 INFO L87 Difference]: Start difference. First operand 2658 states and 2897 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:13:33,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:13:33,909 INFO L93 Difference]: Finished difference Result 4392 states and 4750 transitions. [2022-03-18 13:13:33,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-18 13:13:33,910 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 70 [2022-03-18 13:13:33,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:13:34,081 INFO L225 Difference]: With dead ends: 4392 [2022-03-18 13:13:34,081 INFO L226 Difference]: Without dead ends: 2930 [2022-03-18 13:13:34,137 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2208 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2242, Invalid=7264, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 13:13:34,137 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 323 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 13:13:34,137 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 106 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 13:13:34,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2022-03-18 13:13:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 2876. [2022-03-18 13:13:36,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2621 states have (on average 1.098435711560473) internal successors, (2879), 2785 states have internal predecessors, (2879), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (168), 85 states have call predecessors, (168), 85 states have call successors, (168) [2022-03-18 13:13:36,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 3134 transitions. [2022-03-18 13:13:36,525 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 3134 transitions. Word has length 70 [2022-03-18 13:13:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:13:36,525 INFO L478 AbstractCegarLoop]: Abstraction has 2876 states and 3134 transitions. [2022-03-18 13:13:36,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:13:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 3134 transitions. [2022-03-18 13:13:36,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 13:13:36,565 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:13:36,565 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:13:36,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-03-18 13:13:36,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:36,783 INFO L403 AbstractCegarLoop]: === Iteration 176 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:13:36,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:13:36,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1382895286, now seen corresponding path program 166 times [2022-03-18 13:13:36,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:13:36,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503098751] [2022-03-18 13:13:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:36,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:13:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:36,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:13:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:36,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:13:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:37,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 13:13:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:13:37,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:13:37,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503098751] [2022-03-18 13:13:37,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503098751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:13:37,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204523098] [2022-03-18 13:13:37,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 13:13:37,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:37,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:13:37,695 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:13:37,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-18 13:13:37,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 13:13:37,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:13:37,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-18 13:13:37,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:13:38,173 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:13:38,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:13:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:13:38,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204523098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:13:38,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:13:38,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 59 [2022-03-18 13:13:38,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502546956] [2022-03-18 13:13:38,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:13:38,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-18 13:13:38,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:13:38,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-18 13:13:38,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3297, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 13:13:38,450 INFO L87 Difference]: Start difference. First operand 2876 states and 3134 transitions. Second operand has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:13:45,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:13:45,816 INFO L93 Difference]: Finished difference Result 3108 states and 3389 transitions. [2022-03-18 13:13:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-18 13:13:45,817 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2022-03-18 13:13:45,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:13:45,846 INFO L225 Difference]: With dead ends: 3108 [2022-03-18 13:13:45,847 INFO L226 Difference]: Without dead ends: 3102 [2022-03-18 13:13:45,890 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 136 SyntacticMatches, 5 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=361, Invalid=11629, Unknown=0, NotChecked=0, Total=11990 [2022-03-18 13:13:45,890 INFO L912 BasicCegarLoop]: 201 mSDtfsCounter, 445 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 15857 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 15933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 15857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-18 13:13:45,890 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 458 Invalid, 15933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 15857 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-18 13:13:45,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3102 states. [2022-03-18 13:13:48,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3102 to 2892. [2022-03-18 13:13:48,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2634 states have (on average 1.0987091875474564) internal successors, (2894), 2800 states have internal predecessors, (2894), 88 states have call successors, (88), 5 states have call predecessors, (88), 169 states have return successors, (171), 86 states have call predecessors, (171), 86 states have call successors, (171) [2022-03-18 13:13:48,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 3153 transitions. [2022-03-18 13:13:48,311 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 3153 transitions. Word has length 71 [2022-03-18 13:13:48,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:13:48,311 INFO L478 AbstractCegarLoop]: Abstraction has 2892 states and 3153 transitions. [2022-03-18 13:13:48,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:13:48,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 3153 transitions. [2022-03-18 13:13:48,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 13:13:48,346 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:13:48,346 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:13:48,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-03-18 13:13:48,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:48,560 INFO L403 AbstractCegarLoop]: === Iteration 177 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:13:48,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:13:48,560 INFO L85 PathProgramCache]: Analyzing trace with hash -704284630, now seen corresponding path program 167 times [2022-03-18 13:13:48,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:13:48,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572968889] [2022-03-18 13:13:48,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:48,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:13:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:48,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:13:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:48,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:13:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:48,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 13:13:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:13:49,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:13:49,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572968889] [2022-03-18 13:13:49,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572968889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:13:49,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024673002] [2022-03-18 13:13:49,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 13:13:49,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:49,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:13:49,245 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:13:49,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-18 13:13:49,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-18 13:13:49,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:13:49,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-18 13:13:49,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:13:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:13:49,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:13:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 13:13:50,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024673002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:13:50,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:13:50,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 59 [2022-03-18 13:13:50,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473650100] [2022-03-18 13:13:50,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:13:50,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-18 13:13:50,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:13:50,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-18 13:13:50,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=3293, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 13:13:50,186 INFO L87 Difference]: Start difference. First operand 2892 states and 3153 transitions. Second operand has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:13:56,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:13:56,816 INFO L93 Difference]: Finished difference Result 2898 states and 3158 transitions. [2022-03-18 13:13:56,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-18 13:13:56,817 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2022-03-18 13:13:56,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:13:56,836 INFO L225 Difference]: With dead ends: 2898 [2022-03-18 13:13:56,836 INFO L226 Difference]: Without dead ends: 2876 [2022-03-18 13:13:56,877 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 130 SyntacticMatches, 9 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=363, Invalid=11193, Unknown=0, NotChecked=0, Total=11556 [2022-03-18 13:13:56,878 INFO L912 BasicCegarLoop]: 181 mSDtfsCounter, 354 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 14329 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 14384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 14329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-18 13:13:56,878 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 438 Invalid, 14384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 14329 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-18 13:13:56,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2022-03-18 13:13:59,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2876. [2022-03-18 13:13:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2621 states have (on average 1.098435711560473) internal successors, (2879), 2785 states have internal predecessors, (2879), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (169), 85 states have call predecessors, (169), 85 states have call successors, (169) [2022-03-18 13:13:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 3135 transitions. [2022-03-18 13:13:59,178 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 3135 transitions. Word has length 71 [2022-03-18 13:13:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:13:59,178 INFO L478 AbstractCegarLoop]: Abstraction has 2876 states and 3135 transitions. [2022-03-18 13:13:59,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:13:59,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 3135 transitions. [2022-03-18 13:13:59,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 13:13:59,215 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:13:59,215 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:13:59,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-03-18 13:13:59,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2022-03-18 13:13:59,432 INFO L403 AbstractCegarLoop]: === Iteration 178 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:13:59,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:13:59,432 INFO L85 PathProgramCache]: Analyzing trace with hash 636513738, now seen corresponding path program 168 times [2022-03-18 13:13:59,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:13:59,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717173099] [2022-03-18 13:13:59,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:59,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:13:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:59,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:13:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:59,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:13:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:59,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 13:13:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:14:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:14:00,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:14:00,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717173099] [2022-03-18 13:14:00,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717173099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:14:00,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834269068] [2022-03-18 13:14:00,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 13:14:00,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:14:00,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:14:00,229 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:14:00,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-18 13:14:00,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-18 13:14:00,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:14:00,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-18 13:14:00,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:14:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:14:00,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:14:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:14:01,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834269068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:14:01,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:14:01,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 59 [2022-03-18 13:14:01,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695644954] [2022-03-18 13:14:01,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:14:01,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-18 13:14:01,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:14:01,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-18 13:14:01,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=3289, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 13:14:01,104 INFO L87 Difference]: Start difference. First operand 2876 states and 3135 transitions. Second operand has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:14:07,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:14:07,257 INFO L93 Difference]: Finished difference Result 2882 states and 3140 transitions. [2022-03-18 13:14:07,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-18 13:14:07,258 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2022-03-18 13:14:07,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:14:07,277 INFO L225 Difference]: With dead ends: 2882 [2022-03-18 13:14:07,277 INFO L226 Difference]: Without dead ends: 2858 [2022-03-18 13:14:07,322 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 128 SyntacticMatches, 9 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=365, Invalid=10765, Unknown=0, NotChecked=0, Total=11130 [2022-03-18 13:14:07,323 INFO L912 BasicCegarLoop]: 161 mSDtfsCounter, 315 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 11815 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 11869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 11815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:14:07,323 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 398 Invalid, 11869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 11815 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-18 13:14:07,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2022-03-18 13:14:09,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2858. [2022-03-18 13:14:09,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2606 states have (on average 1.0982348426707598) internal successors, (2862), 2768 states have internal predecessors, (2862), 86 states have call successors, (86), 5 states have call predecessors, (86), 165 states have return successors, (167), 84 states have call predecessors, (167), 84 states have call successors, (167) [2022-03-18 13:14:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 3115 transitions. [2022-03-18 13:14:09,613 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 3115 transitions. Word has length 71 [2022-03-18 13:14:09,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:14:09,614 INFO L478 AbstractCegarLoop]: Abstraction has 2858 states and 3115 transitions. [2022-03-18 13:14:09,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:14:09,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 3115 transitions. [2022-03-18 13:14:09,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 13:14:09,653 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:14:09,653 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:14:09,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-03-18 13:14:09,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:14:09,871 INFO L403 AbstractCegarLoop]: === Iteration 179 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:14:09,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:14:09,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1660863574, now seen corresponding path program 169 times [2022-03-18 13:14:09,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:14:09,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566705557] [2022-03-18 13:14:09,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:14:09,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:14:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:14:09,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:14:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:14:09,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:14:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:14:10,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 13:14:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:14:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:14:10,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:14:10,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566705557] [2022-03-18 13:14:10,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566705557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:14:10,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835826820] [2022-03-18 13:14:10,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 13:14:10,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:14:10,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:14:10,736 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:14:10,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-18 13:14:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:14:10,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-18 13:14:10,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:14:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:14:11,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:14:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:14:11,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835826820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:14:11,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:14:11,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 59 [2022-03-18 13:14:11,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311657058] [2022-03-18 13:14:11,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:14:11,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-18 13:14:11,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:14:11,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-18 13:14:11,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=3285, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 13:14:11,991 INFO L87 Difference]: Start difference. First operand 2858 states and 3115 transitions. Second operand has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:14:17,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:14:17,954 INFO L93 Difference]: Finished difference Result 2864 states and 3120 transitions. [2022-03-18 13:14:17,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 13:14:17,954 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2022-03-18 13:14:17,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:14:17,972 INFO L225 Difference]: With dead ends: 2864 [2022-03-18 13:14:17,973 INFO L226 Difference]: Without dead ends: 2838 [2022-03-18 13:14:18,016 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 126 SyntacticMatches, 9 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=367, Invalid=10345, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 13:14:18,016 INFO L912 BasicCegarLoop]: 141 mSDtfsCounter, 276 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 10190 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 10242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 10190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-18 13:14:18,016 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 373 Invalid, 10242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 10190 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-18 13:14:18,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2022-03-18 13:14:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2838. [2022-03-18 13:14:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2838 states, 2589 states have (on average 1.0981073773657783) internal successors, (2843), 2749 states have internal predecessors, (2843), 85 states have call successors, (85), 5 states have call predecessors, (85), 163 states have return successors, (165), 83 states have call predecessors, (165), 83 states have call successors, (165) [2022-03-18 13:14:20,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2838 states to 2838 states and 3093 transitions. [2022-03-18 13:14:20,190 INFO L78 Accepts]: Start accepts. Automaton has 2838 states and 3093 transitions. Word has length 71 [2022-03-18 13:14:20,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:14:20,190 INFO L478 AbstractCegarLoop]: Abstraction has 2838 states and 3093 transitions. [2022-03-18 13:14:20,190 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:14:20,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2838 states and 3093 transitions. [2022-03-18 13:14:20,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 13:14:20,226 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:14:20,226 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:14:20,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-03-18 13:14:20,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-03-18 13:14:20,441 INFO L403 AbstractCegarLoop]: === Iteration 180 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:14:20,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:14:20,442 INFO L85 PathProgramCache]: Analyzing trace with hash 382544458, now seen corresponding path program 170 times [2022-03-18 13:14:20,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:14:20,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700354653] [2022-03-18 13:14:20,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:14:20,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:14:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:14:20,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:14:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:14:20,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:14:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:14:20,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 13:14:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:14:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:14:21,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:14:21,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700354653] [2022-03-18 13:14:21,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700354653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:14:21,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754410827] [2022-03-18 13:14:21,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:14:21,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:14:21,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:14:21,303 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:14:21,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-18 13:14:21,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:14:21,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:14:21,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-18 13:14:21,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:14:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:14:22,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:14:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 13:14:22,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754410827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:14:22,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:14:22,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 59 [2022-03-18 13:14:22,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727855310] [2022-03-18 13:14:22,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:14:22,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-18 13:14:22,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:14:22,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-18 13:14:22,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3281, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 13:14:22,673 INFO L87 Difference]: Start difference. First operand 2838 states and 3093 transitions. Second operand has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:14:28,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:14:28,094 INFO L93 Difference]: Finished difference Result 2844 states and 3098 transitions. [2022-03-18 13:14:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 13:14:28,095 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2022-03-18 13:14:28,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:14:28,114 INFO L225 Difference]: With dead ends: 2844 [2022-03-18 13:14:28,114 INFO L226 Difference]: Without dead ends: 2816 [2022-03-18 13:14:28,291 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 124 SyntacticMatches, 9 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=369, Invalid=9933, Unknown=0, NotChecked=0, Total=10302 [2022-03-18 13:14:28,291 INFO L912 BasicCegarLoop]: 121 mSDtfsCounter, 237 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 8825 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 8875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 8825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-18 13:14:28,291 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 353 Invalid, 8875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 8825 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-18 13:14:28,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2816 states. [2022-03-18 13:14:30,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2816 to 2816. [2022-03-18 13:14:30,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2570 states have (on average 1.0980544747081713) internal successors, (2822), 2728 states have internal predecessors, (2822), 84 states have call successors, (84), 5 states have call predecessors, (84), 161 states have return successors, (163), 82 states have call predecessors, (163), 82 states have call successors, (163) [2022-03-18 13:14:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 3069 transitions. [2022-03-18 13:14:30,446 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 3069 transitions. Word has length 71 [2022-03-18 13:14:30,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:14:30,446 INFO L478 AbstractCegarLoop]: Abstraction has 2816 states and 3069 transitions. [2022-03-18 13:14:30,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:14:30,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 3069 transitions. [2022-03-18 13:14:30,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 13:14:30,481 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:14:30,481 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:14:30,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-03-18 13:14:30,684 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-03-18 13:14:30,684 INFO L403 AbstractCegarLoop]: === Iteration 181 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:14:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:14:30,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1528430378, now seen corresponding path program 171 times [2022-03-18 13:14:30,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:14:30,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714326709] [2022-03-18 13:14:30,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:14:30,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:14:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:14:30,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:14:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:14:30,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:14:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:14:30,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 13:14:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:14:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:14:31,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:14:31,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714326709] [2022-03-18 13:14:31,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714326709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 13:14:31,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86235543] [2022-03-18 13:14:31,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:14:31,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:14:31,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:14:31,375 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:14:31,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-18 13:14:31,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-18 13:14:31,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:14:31,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 13:14:31,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:14:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:14:32,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:14:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 13:14:32,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86235543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:14:32,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 13:14:32,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 59 [2022-03-18 13:14:32,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280721739] [2022-03-18 13:14:32,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 13:14:32,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-18 13:14:32,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:14:32,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-18 13:14:32,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3277, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 13:14:32,772 INFO L87 Difference]: Start difference. First operand 2816 states and 3069 transitions. Second operand has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:14:37,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:14:37,667 INFO L93 Difference]: Finished difference Result 2822 states and 3074 transitions. [2022-03-18 13:14:37,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 13:14:37,668 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2022-03-18 13:14:37,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:14:37,692 INFO L225 Difference]: With dead ends: 2822 [2022-03-18 13:14:37,692 INFO L226 Difference]: Without dead ends: 2792 [2022-03-18 13:14:37,733 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=371, Invalid=9529, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 13:14:37,733 INFO L912 BasicCegarLoop]: 101 mSDtfsCounter, 198 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 7625 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 7673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 7625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 13:14:37,733 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 338 Invalid, 7673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 7625 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 13:14:37,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2022-03-18 13:14:39,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2792. [2022-03-18 13:14:39,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2549 states have (on average 1.0980776775205963) internal successors, (2799), 2705 states have internal predecessors, (2799), 83 states have call successors, (83), 5 states have call predecessors, (83), 159 states have return successors, (161), 81 states have call predecessors, (161), 81 states have call successors, (161) [2022-03-18 13:14:39,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 3043 transitions. [2022-03-18 13:14:39,930 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 3043 transitions. Word has length 71 [2022-03-18 13:14:39,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:14:39,931 INFO L478 AbstractCegarLoop]: Abstraction has 2792 states and 3043 transitions. [2022-03-18 13:14:39,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:14:39,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 3043 transitions. [2022-03-18 13:14:39,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 13:14:39,965 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:14:39,965 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:14:39,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-03-18 13:14:40,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2022-03-18 13:14:40,171 INFO L403 AbstractCegarLoop]: === Iteration 182 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:14:40,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:14:40,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1393498422, now seen corresponding path program 172 times [2022-03-18 13:14:40,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:14:40,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605457002] [2022-03-18 13:14:40,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:14:40,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:14:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:14:40,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:14:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:14:40,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 13:14:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:14:40,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 13:14:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat